Question 93439
x^2+(x+1)^2=85
x^2+x^2+2x+1=85
2x^2+2x+1-85=0
2x^2+2x-84=0
2(x^2+x-42)=0
2(x+7)(x-6)=0
x-6=0
x=6 answer.
x+1=7 answer.
proof
6^2+7^2=85
36+49=85
85=85