Question

Simplify: `(a+1)(a-2)-2a+4` ?

Answer 1

`(a-2)(a-1)`

Explanation:

Expression `= (a+1)(a-2)-2a+4`

Expand the product:

`= a^2+a-2a-2 -2a+4`

Combine like terms:

`= a^2-3a+2`

Factorise:

`= (a-2)(a-1)`