Question 458185
There is nothing to solve. It is an expression not an equation. We solve equations.
Is x the same as X?
In math, they are not the same.
The expression can be factored. First factor out x
x^2+4x-12

find factors of -12 which add to 4
6 and -2
(x+6)*(x-2)

x*(x+6)*(x-2)