Answer:
x^2 +3x -4 = 0 --> (x +4)(x -1) = 0
Step-by-step explanation:
Let's find A and B such that
A*B = - 4 and A+B = 3
Numbers are:
A = +4 and B = -1
The factoring equation is y = (x + A)(x + B)
In this specific case: y = (x +4)(x -1)
Solutions to the quadratic equation require
y = (x +4)(x -1) = 0
and hence
x +4 = 0 --> x = -4
x - 1 = 0 --> x= +1
