(x+1)^2=7918-2x (x+2)^2=3131-2x
X^2+4x+4=3131-2x x^2+4x+2x+4-3131=0 x^2+6x-3127=0 D=36-4*1*(-3127)=12544 x1=-6+112/2=53 x2=-6-112/2=59 (x+1)^2=7918-2x x^2+2x+1-7918+2x=0 x^2+4x-7917=0 D=31684 x=-91, x=87