Question

How do you simplify `(3a^3 - 7a^2 + a) - (6a^3 - 4a^2 - 8)`?

Answer 1

`color(blue)(-3a^3) -color(red)(3a^2) + a+8`

Explanation:

`color(blue)(3a^3) - color(red)(7a^2) + a - color(blue)(6a^3) + color(red)(4a^2) + 8`

Grouping like terms:

`color(blue)(3a^3-6a^3) color(red)(-7a^2+ 4a^2)+ a +8`

`= color(blue)(-3a^3) -color(red)(3a^2) + a+8`