M⁴+3m³-m² 3ab²+6ab³-18ab a(x+y) + b(x+y) 5x(a+b) - 4y(a+b) x(a-b) + y(b-a) p(x-y) - q(y-z) 3(x+y) + (x+y)³
3ab^2+6ab^3-18ab=0 3ab(ab+2ab^2-6) =0 /3ab ab+2ab^2-6=0 2ab^2+ab-6=0 D=1+48=49 x1=-1+7/4=1, 5 x2=-1-7/4=-2 x1=1, 5 x2=-2