Question

(x-7)(x+7)+(x-2)^2=-(x+5)^2+11x+30

Answer 1

х^2+7х-7х-49+х^2-4х+4=-(х^2+10х+25)+11х+30,
2х^2-45-4х+х^2+10х+25-11х-30=0,
3х^2-5х-50=0,
D=625
Х1=5
Х2=-3,1/3