Descompuneti in factori. x^2+4x-5=?

Assume that,

x^2+4x-5 = 0 ... (1)

Then, x^2+4x-5 = 0 x^2+5x-1x-5 = 0

x (x+5) - 1 (x+5) = 0

(x+5) (x-1) = 0

We get x=-5 and x=1

Sub x=-5 in equ (1)

(-5) ^2+4 (5) - 5 = 0

-25+20-5 = 0

-25+25 = 0

0 = 0

Sub x=1 in equ (1) (1) ^2+4 (1) - 5 = 0

1+4-5 = 0 5-5 = 0

0 = 0

Therefore x value is - 5 and 1