Subtract.
-$\frac { 2 } { 21 x } - \frac { 4 } { 15 x ^ { 2 } }$
A) $- \frac { 2 } { 315 x ^ { 2 } }$
B) $\frac { 2 ( 5 x - 14 ) } { 105 x ^ { 2 } }$
C) $\frac { 2 } { 21 x + 15 x ^ { 2 } }$
D) $\frac { 10 x - 28 } { 105 x ^ { 2 } }$

Question

Quizplus · Accepted Answer

To subtract the fractions, find a common denominator, which is $105x^2$ (the least common multiple of $21x$ and $15x^2$). Convert each fraction and subtract them to get $\frac{2(5x-14)}{105x^2}$.

Subtract - 221x−415x2\frac { 2 } { 21 x } - \frac { 4 } { 15 x ^ { 2 } }21x2​−15x24​

Subtract
- $\frac { 2 } { 21 x } - \frac { 4 } { 15 x ^ { 2 } }$