Решите уравнения 8(x-10)^2-11(x+5)^2=-3x^2-170x+1600

8(x-10)^2-11(x+5)^2=-3x^2-170x+1600
8(x^2-20x+100)-11(x^2+10x+25)^2=-3x^2-170x+1600
8x^2-160x+800-11x^2-110x-275=-3x^2-170x+1600
-160x+170x-110x=275+1600-800
-100x=1075
x=-10.75