Question

How do you combine like terms in `\frac { 7r ^ { 3} - 7} { 2r ^ { 6} + 11} - \frac { 4r ^ { 3} } { 2r ^ { 6} + 11}`?

Answer 1

`(3r^3-7)/(2r^6+11)`

Explanation:

`"since the denominators of both fractions are common"`
`"we subtract the numerators leaving the denominator"`

`=(color(red)(7r^3)-7color(red)(-4r^3))/(2r^6+11)=(3r^3-7)/(2r^6+11)`