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Mathematics 7 Online
OpenStudy (help_people):

Factor the GCF: −4y2 + 12y − 16. −1(4y2 − 12y + 16) −4y(y2 − 3y + 4) −4(y2 − 3y + 4) −4(y2 + 3y − 4)

OpenStudy (help_people):

im not sure what the asnwer is to thi sone

OpenStudy (help_people):

Determine which polynomial is a perfect square trinomial. 25x2 − 40x − 16 9a2 − 20a − 25 25b2 − 15b + 9 16x2 − 56x + 49

OpenStudy (help_people):

d is the right one

OpenStudy (help_people):

@Mehek14 @ospreytriple

OpenStudy (anonymous):

the GCF is the highest number that we can divide the equation on it in 1st question the 2nd and 4th options are wrong, so you have 2 options the 1st and 3rd now you can decide which one has the GCF

OpenStudy (help_people):

im going to go with the 3rd

OpenStudy (anonymous):

good

OpenStudy (help_people):

ok how about the next one?

OpenStudy (anonymous):

for next one do you know who is the perfect square?

OpenStudy (help_people):

d

OpenStudy (help_people):

is the answer nut im asking 2 make sure

OpenStudy (anonymous):

i am not asking for answer i ask what is the perfect square in general?

OpenStudy (help_people):

[roducit of two intergers a number that can be expressed as a product of two integers

OpenStudy (anonymous):

yea it is produced when a two similar numbers are multiplied each other for example 4*4=16 then 16 is a perfect square similarly (a+b)*(a+b)= \[a ^{2}+2ab+b ^{2}\] this is a perfect square

OpenStudy (anonymous):

so if you want to find the answer factor out each equation, once you have two similar brackets that is your answer

OpenStudy (help_people):

ok i got d

OpenStudy (anonymous):

yes right in simple way look at your equation both 16x^2 and 49 are perfect squares, and -56 is twice the product of 4x and 7 so it's a perfect square

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