Question 808999
integers x & x+2

x^2+(x+2)^2=84+x(x+2)

x^2+x^2+4x+4=84+x^2+2x

simplify

x^2+2x-80=0

x^2+10x-8x-80=0

x(x+10)-8(x+10)=0

(x+10)(x-8)=0

c=-10 OR x=8

8,10 OR -10,-8