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Fill in the blank with a constant, so that the resulting quadratic expression is the square of a binomial.
x^2 + 8x + ____

 Feb 6, 2022
 #1
avatar+23183 
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To "complete the square" when the coefficient of the x2 term is 1:

    divide the coefficient of the x-term by 2            (8 / 2  =  4)

    square this answer                                            (42  =  16)

 

So, the answer is  16.

 Feb 6, 2022

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