Answer
$64x^2-16x+1$
Work Step by Step
RECALL:
$(a-b)^2=a^2-2ab+b^2$
Use the formula above with $a=8x$ and $b=1$ to obtain:
$(8x-1)^2
\\=(8x)^2-2(8x)(1)+1^2
\\=64x^2-16x+1$
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