1) х(х-2)(х+1)=х^2(х-1)
(x^2 - 2x)(x+1) = x^3 - x^2
x^3 + x^2 - 2x^2 - 2x = x^3 - x^2
x^3 + x^2 - 2x^2 - 2x - x^3 + x^2 = 0
-2x = 0
x=0
2) а)3х-3у+х^2у-ху^2 = 3(x-y) + xy(x-y) = (x-y)(3 + xy)
б)а^3-8 = (a-b)(a-b)(a-b)
1) х(х-2)(х+1)=х^2(х-1)
(x^2 - 2x)(x+1) = x^3 - x^2
x^3 + x^2 - 2x^2 - 2x = x^3 - x^2
x^3 + x^2 - 2x^2 - 2x - x^3 + x^2 = 0
-2x = 0
x=0
2) а)3х-3у+х^2у-ху^2 = 3(x-y) + xy(x-y) = (x-y)(3 + xy)
б)а^3-8 = (a-b)(a-b)(a-b)