Question

Factorize x³-21x+20 .....plz fast

Answer 1

Hey

Your question : x^2 - 21x + 20

Here is your answer,

x^2 - 21x + 20 = 0
X^2 - x - 20x + 20 = 0
X ( x - 1 ) - 20 ( x - 1 ) = 0
( X - 1 )( x - 20 ) = 0
X - 1 = 0
X = 1
X - 20 = 0
X = 20

Hope it helps you!