Question

How do you solve `x^2 + x - 8 = 4` by factoring?

Answer 1

`x=3` or `x=-4`

Explanation:

Given
`color(white)("XXX")x^2+x-8=4`

`rArr`
`color(white)("XXX")x^2+x-12=0`

Factoring
`color(white)("XXX")(x-3)(x+4)=0`

`rArr`
#color(white)("XXX"){:((x-3)=0,color(white)("XX")orcolor(white)("XX"),(x+4)=0), (rarrx=3,,rarrx=-4):}#