Question

7(X+8)+(X+8)(X-8)
(X+5)4X-(2X+5)в квадрате.
Упростить

Answer 1

=7x+7*8+x^2-8^2+x4x+5x4-(2x)^2+2*2x5+5^2;
=7x+56+x^2-64+4x^2+20x-4x^2+20x+25;
=47x+17+x^2;