64-x2 = (8-x)(8+x) when factored
(5x + 2)(x - 5)
x2 - 2x = x(x - 2)
(2x - 1)(x + 3)
x2 + 7x - 56 cannot be factorised.
You can use the formula for factoring the difference of two squares in this case.
A factor is like this. Original :x^2 + 7x - 18 (( x squared plus six x minus 18) Factored: (x+9)(x-2) ((x plus nine times x minus two))
Factor out a 22(X2 + X - 12)2(X - 3)(X + 4)===========
6(2x - 3y)