x^2-8x+16分之x^2-4x

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x^2-8x+16分之x^2-4x

x^2-8x+16分之x^2-4x
x^2-8x+16分之x^2-4x

x^2-8x+16分之x^2-4x
(x²-4x)/(x²-8x+16)
=x(x-4)/(x-4)²
=x/(x-4)
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x^2-8x+16分之x^2-4x
=(x-4)²分之x(x-4)
=(x-4)分之x

(x^2-8x+16)分之(x^2-4x)
=(x-4)^2分之x(x-4)
=(X-4)分之x