Add or subtract.
-$\frac { 7 } { 18 x } + \frac { 8 } { 3 x ^ { 2 } }$
A) $\frac { 7 x + 48 } { 18 x ^ { 3 } }$
B) $\frac { 7 x + 48 } { 18 x ^ { 2 } }$
C) $\frac { 7 x + 48 } { 18 x }$
D) $\frac { 7 x + 8 } { 18 x ^ { 2 } }$

Question

Quizplus · Accepted Answer

To add the fractions, find a common denominator, which is $18x^2$ in this case. Convert $\frac{7}{18x}$ to have this common denominator by multiplying both the numerator and denominator by $x$, resulting in $\frac{7x}{18x^2}$. The second fraction is already in terms of $x^2$, so it becomes $\frac{8}{3x^2} = \frac{48}{18x^2}$. Adding these gives $\frac{7x + 48}{18x^2}$.

Add or Subtract 718x+83x2\frac { 7 } { 18 x } + \frac { 8 } { 3 x ^ { 2 } }18x7​+3x28​

Add or Subtract $\frac { 7 } { 18 x } + \frac { 8 } { 3 x ^ { 2 } }$