Question

5x(x-3)-(x-2)^2 при x=-3

Answer 1

$5x(x-3)-(x-2)^2=5x^2-15x-(x^2-4x+4)=\=5x^2-15x-x^2+4x-4=4x^2-11x-4\\x=-3\4(-3)^2-11(-3)-4=4*9+33-4=36+29=65$