Question

How do you factor `4x^3 - x^2 + 4x -1`?

Answer 1

We can make groups of two to factorise this expression:
`(4x^3 +4x) - (x^2+1)`
`4x` is common to both the terms in the first group.
We can write the expression as :
`4x(x^2 +1) - 1(x^2+1)`
`=color(blue)((4x-1)(x^2+1)`