Question

What is the factored form of x^2-x-20​

Answer 1

Explanation:

x^2-5x+4x-20

x(x-5)+4(x-5)

(x-5)(x+4)

Answer 2

(x+4)(x-5)

Explanation:

x²-x-20

But ax² + bx +c

product = ac = 1 × -20 = -20

sum = b = -1

Factors are: -5,4( numbers if you multiply you get -20 and sum to get -1)

Therefore:

x²-5x+4x-20

x(x-5)+4(x-5)

(x+4)(x-5)