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PARRC Test Practice Question 4 for Algebra 1

Added Sep 18, 2015 •

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number for says which factorization can be used to reveal the zeros of the function f of n what's -12 in squared - 11 in + 15 and it sure does look like a mess but let's break it down so we got here what we have is a quadratic trinomial and it's just some fancy word for a parabola in this case is going to be an upside and up for Avila what's the code fish on the front end is -12 concern ourselves with that and we really don't even need a zeros somebody needs to know which way is the best way to factor so what that what I tell students to use the foil method the first outer inner and and the first thing I tell them to do is draw two sets of parentheses that they can use I was just like this to factor out of this quadratic trinomial with three terms first term is in square making this a quadratic this is basically going to eliminate one I mean because is not completely factored Factor honest so even though it pulls on an an and it's true what it says it doesn't reveal look at them semantics it says zeros so we're looking for two sets of or more than one basically and this one only has one so that's going to Lemonade number one number two and we're going to use the foil method and I'm going to use crayons because lot of students in the like this and I'm going to try to keep consistent with my color I saw these black for first the first terms here are -4 in  and the first time a second one is 3 in and we are going to multiply those two terms -12 in square which is what we have in our dare question right so so far so good I will take the outer terms Megaforce also an outer time and five is an hour so I'm going to use per today  just to show you what spot so it would take the outer terms and -4 in * 5 in and ask him to give me -20 in to a place right here  I'm trying to switch between 10 and miles and Riverside play the stove that going to be 3 x 3 and we use red for that  and the answer is going to be three times Avelox just want to Street history on as well and that's going to be 9 a.m.  so let's write on 9 a.m. here Plus + 9 mm that's a plus sign  it's not coming out too well but it is a plus sign I'll ask in the last terms will be the three times of five of the 15 and so go ahead and grab orange for that Teresa salsa will have plus 15 the tail end of this  and then what we have to do my phone I think it was a previous problem with the combine like terms and the two middle terms in this case and more tonsillitis the case or the light turns on here we have now 20 in plus a positive 9 is going to give us a negative 11 in so in essence we have our solution -12 in square -11 m + 15 is be so B is D the correct answer since we're here for learning purposes let's finish the Finish C&D and see if we can determine while they're all and I want to do that but there's a who sang I want to show you as well and the question is asking us to reveal the zeros and While others to reveal the same which ones which sucks which would be the best one to do suck so kind of want to take a minute to show you that basically you take both of these parentheses and said of eat with zero and solve for n so if we were to solve for the zero on the first one who crossed the Frog across the x-axis we would say -4 + food say -4 + + 3  equal zero and then we also come over here and take the other one free and plus 5 and we'd sit down and eat lazier oh  that's all animal cases you subtract 3 from call suds  that cancels we have -4 m equals -3 could to end myself / Nae for the news can't talk to one of those Eros crosses the x-axis at the nega's Kennesaw at 3/4 the other one is to try fire from both sides you have three and equals -5 and 1/2 in equals negative off 3rd so if it was to ask you what the zeros of the function of me that's how you go ahead and do it but the question and answers are in Access will be the best way to factor it and be with the correct solution let's go and take a look at the CD while we're here and if you hang around and we'll go through and we'll see why Cindy was wrong it'll be good for your practice purses if you are on the actual Park test on any what kind of course test I would not recommend this because time is of the essence but as we're here in learning more we may as well take the opportunity okay we have an leaving this parentheses which in essence like I said the photos of -1 so that's going to make this -4 + -3 and then we'll take that and multiply a * 300 + 5 Syrian place and I'm switching back and forth now between pan and ass stumble 3M Paws 5  Sofia the First terms for enzyme steering wheel get -12 in squared so that's good hours would be negative 3 * -4 + * 5 hours that would give us -20 in like it did on the last one was kind of right 94 in x 3 knows names 12in Square  that's our first terms star out of towns would be -400 times of 5 give us -20 in in terms of E if 3 * 3 is 9  last chance will be native 3 * 5 is -15 I was getting nervous for a minute cuz it look like see with some same answer as well because this came out to BNA of 11 in but then I noticed on the tail end of see we come up with negative 15 we're on the question with positive 15 SOC is not the cry I'm not the correct solution so you also songs when you doing this stuff and try to keep yourself organized the best you can I'm guilty that's what I myself what's up what is in a fat that I need to stay organized in my mouth so hoping you'll do the same I listen to the last one for good measure our first terms would be foreign -3 and that's going to give us -12 and squared again I was trying to trick us on the first time the first is boom boom boom I last I mean it'll say outer sometimes I skip the last but I don't want to mess you up let's just go straight will be for an S5 will be positive 20in that's not looking good cuz we really need an a of 11 in a middle of a positive 20 in here  for outer tie my answer was going to be three times -3 or -9 and I last time schizm is going to be 15 3 x 5  the last times 15 so that's one dear last term was good and I first turns going to be here we can buy on a middle like terms we can get positive 11in and we need Naval Eminem what date is not correct choice and they have it for problem number for correct answer is B

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PARRC Test Practice Question 4 for Algebra 1

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