Question

X² – 8x - 20
Factor the quadratic completely

Answer 1

(x+-10)(x+2)

Explanation:

Whenever there is a x²

we can always start off with

(x+_)(x+_)

then we take the rest of the eqn – 8x - 20

the b value is what be always add to and the c value is what we factor. So what factor pair of 20 adds to -8?

its -10 & 2 because its =20 and when you add it together its -8

Then you plug it in:

(x+_)(x+_)

(x+-10)(x+2)