Advertisements
Advertisements
Question
Factorise the following:
x3 – 5x2 – 4x + 20
Sum
Advertisements
Solution
Given: x3 – 5x2 – 4x + 20
We know that,
= (x3 – 5x2) + (– 4x + 20)
Hence,
⇒ x2(x – 5) – 4(x – 5)
⇒ (x – 5) (x2 – 4)
⇒ x2 – 4 = (x + 2) (x – 2)
⇒ (x – 5) (x + 2) (x – 2)
shaalaa.com
Is there an error in this question or solution?
