Question

How do you find the sum or difference of `(4rxt-8r^2x+x^2)-(6rx^2+5rxt-2x^2)`?

Answer 1

See below.

Explanation:

`(4rxt-8r^2x+x^2)-(6rx^2+5rxt-2x^2)`

`=4rxt-8r^2x+x^2-6rx^2-5rxt+2x^2` expand brackets

`=-rxt-14r^2x+3x^2` collect like terms