Question

How do you simplify `\frac { 4} { 5v - 5} - \frac { 4v } { v - 7}`?

Answer 1

`(-20v^2+24v-28)/((5v-5)(v-7))`

Explanation:

`4/(5v-5)-(4v)/(v-7)`

=`(4(v-7)-4v(5v-5))/((5v-5)(v-7))`

=`(4v-28-20v^2+20v)/((5v-5)(v-7))`

=`(-20v^2+24v-28)/((5v-5)(v-7))`