f(x)=x²-x then f(x-1) - f(x+1)=
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Let's simplify step-by-step.
f(x-1)-f(x+1)
Distribute:
= (f)(x)+(f)(-1)+-fxt
=fx+-+-fx+-f
Combine Like Terms:
=fx+-+-fx+-f
=(fx+-fx)+(-f+-f)
=-2f
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