Answer:
1. x + x2 = 56
2. Subtract 56 from both sides leaves us x +x2 -56 =0; rearranging gives us x2+x-56=0
3. Note that the equation in step 2 is a quadratic equation.
4. Factoring the equation gives us (x+8)*(x-7) = 0
5. Therefore x= -8, and x = 7.
