Question

factorise: x^3+x^2-4x-4

Answer 1

Hello Friend,

Here's the answer.

x³ + x² - 4x - 4
= x²(x + 1) - 4(x + 1)
= (x + 1)(x² - 4)
= (x + 1)(x + 2)(x - 2)

[ As (x² - a²) = (x + a)(x - a) ]

Hope it helps.

Purva
@Purvaparmar1405
Brainly.in

Answer 2

Hey friend check this.
First of all use hit and trial method
You will find first root is 2

Then divide the polynomial with x-2

You will get a polynomial of degree 2 as quotient. X2 +3x+2.


Then factories it
=X2 +x+2x+2
=X(x+1)2(x+1)
=(X+1)(x+2)

So roots are 2,-2,-1.

Hope this will help you. @