Question

решите уравнение :2(x-2)(x+2)=(x-4)(x+4)+(x-3)(x+3)+x

Answer 1

2(x-2)(x+2)=(x-4)(x+4)+(x-3)(x+3)+x2(х²-4)=х²-16+х²-9+х
2х²-8=2х²+х-25
х=-8+25
х=17