Question

How do you simplify `(10x^3 - 4x^2 + 3x) - (x^3 - x^2 + 1)`?

Answer 1

`9x^3 - 3x^2 + 3x - 1`

Explanation:

Remove the brackets, notice that the minus sign will change the signs inside the second bracket:

`(10x^3 - 4x^2 + 3x) - (x^3 - x^2 + 1)`

=`10x^3 - 4x^2 + 3x - x^3 + x^2 -1 " collect like terms"`

=`9x^3 - 3x^2 + 3x - 1`