Question

x^2-x=56

Answer 1

You can set the equation equal to 0 to give...
(x^2) - x - 56 = 0
You can then simply factor a trinomial...
(-7 + -1x) (8 + -1x) = 0
You can then solve each equation to find the solutions....
1. (-7 + -1x) = 0
-1x = 7
x=-7
2. (8 - x) = 0
x = 8
So the final answer will be x = -7 and 8
Hope this helped.

Answer 2

Hey moha, probably better to ask math in the math section :)