Question 48853
your formula is correct x~2+(x+2)~2-x(x+2)=67 or x~2+x~2+4x+4-x~2-2x=67 or

x~2-2x-63=0 or (x-7)(x-9)=0 or x=7 & x=9 

proof 7~2+9~2-7*9=67 or 49+81-63=67 or 130-63=67 or 67=67