f(x)=x^2-x
f(x-1)= (x-1)^2-(x-1)
=(x^2-2x+1)-(x-1)
=x^2-2x+1-x+1
=x^2-3x+2 opción d
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f(x)=x^2-x
f(x-1)= (x-1)^2-(x-1)
=(x^2-2x+1)-(x-1)
=x^2-2x+1-x+1
=x^2-3x+2 opción d