Question

How do you simplify `7rs(4r^2+9s^3-7rs)`?

Answer 1

`28r^3s+63rs^4-49r^2s^2`

Explanation:

Distribute the bracket by multiplying each term in the bracket by 7rs.

`rArrcolor(red)(7rs)(4r^2+9s^3-7rs)`

`=(color(red)(7rs)xx4r^2)+(color(red)(7rs)xx9s^3)+(color(red)(7rs)xx(-7rs))`

`=28r^3s+63rs^4-49r^2s^2`