8x7−8x2+28−4x7−4x7+9x2 при x=-5.

Question

8x7−8x2+28−4x7−4x7+9x2 при x=-5.

Answer 1

8x^7−8x^2+28−4x^7−4x7+9x^2=4x^7+x^2+28
x=-5
4*(-78125)+25+8=-312500+33=-312467