Question

решите уравнения (x-4)^2+(x+7)^2=2x^2-1

Answer 1

x^2-8x+16+x^2+14x+49=2x^2-1
6x=-66
x=-11

Answer 2

х²+16-8х+х²+49+14х-2х²+1=0
6х=-66
х=-11
Ответ: -11.