Przekształćcie: y=(x-1)(x+1)* w miejscu * bedzie znak do potegi 2
y=(x-1)(x+1)^2 = (x-1)(x^2 +2x+1)=
= x^3+2x^2+x-x^2-2x-1=
=x^3+x^2-x-1
y=(x-1)(x+1)*2
y=x*2 +1x-1x-1
y=x*2-1
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y=(x-1)(x+1)^2 = (x-1)(x^2 +2x+1)=
= x^3+2x^2+x-x^2-2x-1=
=x^3+x^2-x-1
y=(x-1)(x+1)*2
y=x*2 +1x-1x-1
y=x*2-1