(x-16)(x+16)=x^2-4x

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Solution for (x-16)(x+16)=x^2-4x equation: 



(x-16)(x+16)=x^2-4x

We move all terms to the left:

(x-16)(x+16)-(x^2-4x)=0

We use the square of the difference formula

x^2-(x^2-4x)-256=0

We get rid of parentheses

x^2-x^2+4x-256=0

We add all the numbers together, and all the variables

4x-256=0

We move all terms containing x to the left, all other terms to the right

4x=256

x=256/4

x=64

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