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Which expression represents x² + 8x + 16 in factored form?

 

SamJones  Jan 17, 2018
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We are looking for two things that sum to 8  and multiply to 16

 

1 + 7       1 * 7   =   7     no good

2 + 6        2* 6  =   12    no good

3 + 5       3 * 5  =  15    no good

 

4 + 4        4 * 4  =  16           this is what we need

 

So.....we have

 

(x + 4)  (x + 4)  =  (x + 4)2

 

 

cool cool cool

CPhill  Jan 17, 2018

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