Question

Expand and simplify (x - 1)(x + 2)(x - 1)

Answer 1

x^3 -3x + 2

Explanation:

(x - 1)(x - 1) =

x^2 -2x + 1 (x+2) =

x^3 + 2x^2

-2x^ - 4x

x + 2

----------------------------

x^3 -3x + 2

Answer 2

`(x - 1)(x + 2)(x - 1)=(x-1)^(2)(x+2)`

Explanation:

Use the product rule
`x^(a) x^(b)=x^(a+b)`