Question

(x-y)(x^2-xy-y^2)

(3-x)(3x^2+x-4)

представьте в виде многочелна

Answer 1

=x^3-x^2y-xy^2-x^2y+xy^2+y^3=x^3+y^3-2x^2y

=9x^2+3x-12-3x^3-x^2+4x=-3x^3+8x^2+7x-12