Question

Спростити вираз: x(2x-9)^2-2x(15+x)^2

Answer 1

x(2x-9)^2-2x(15+x)^2=

=x*(4x^2-36x+81)-2x*(225+30x+x^2)=

=4x^3-36x^2+81x-450x-60x^2-2x^2=

=2x^3-96x^2-369x