Question

упростите выражение (3x+x^2)^2-x(x-5)(x+5)+2x(8-3x^2)

Answer 1

(3x+x^2)^2-x(x-5)(x+5)+2x(8-3x^2)=9x^2+6x^3+x^4-x(x^2-25)+16x-6x^3=9x^2+x^2-x^3+25x+16x=-x^3+10x^2+41x