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-4(2+x)2=14
We move all terms to the left:
-4(2+x)2-(14)=0
We add all the numbers together, and all the variables
-4(x+2)2-14=0
We multiply parentheses
-8x-16-14=0
We add all the numbers together, and all the variables
-8x-30=0
We move all terms containing x to the left, all other terms to the right
-8x=30
x=30/-8
x=-3+3/4
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