(4x-4)2-4(4x-4)-21=0

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Solution for (4x-4)2-4(4x-4)-21=0 equation: 



(4x-4)2-4(4x-4)-21=0

We multiply parentheses

8x-16x-8+16-21=0

We add all the numbers together, and all the variables

-8x-13=0

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

-8x=13

x=13/-8

x=-1+5/8

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