Question

x^2-x-20 = _______ (x+4)
what is the answer in the gap?
please say fast​

Answer 1

Answer:

(x-5) is the answer......

Answer 2

Answer:

$= {x}^{2} - x - 20 \\ \\ = {x}^{2} - 5x + 4x - 20 \\ \\ = x(x - 5) + 4(x - 5) \\ \\ =( x + 4)(x - 5) \\ \\ \\ so \: \: \: the \: \: \: answer \: \: \: is \: \: \: (x - 5)$