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16-08-2017
Mathematics

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What is a difference of squares that has a factor of x + 8

Complete the expression:

x^2 – _____

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16-08-2017

a²-b²=(a-b)(a+b)

so if (x+8) is a factor then (x-8) is also a factor

so
(x+8)(x-8)=x²-8²=x²-64

the blank is 64

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