Question

If (x-a) is a factor of the expression ax^3-3x^2-5ax-9, find the possible values of a. Factorise the expression for each of the values of a.

Answer 1

@DLS

Answer 2

@CGGURUMANJUNATH

Answer 3

@aum

Answer 4

Let f(x) = ax^3-3x^2-5ax-9
Since (x-a) is a factor of f(x), f(a) = 0.
Solve this equation to find the value of a first.

Answer 5

a^4-8a^2-9=0
like this

Answer 6

Yes.

Answer 7

what's nxt

Answer 8

Solve this equation

Answer 9

I don't know hw to factorise this equation..

Answer 10

Let a^2 = b, then it becomes
b^2-8b-9=0
Can you factorize the left side of the equation?