Evaluate
-\frac{3h\left(k+21\right)}{a}
Expand
-\frac{3\left(hk+21h\right)}{a}
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\frac{-h\left(3k+63\right)}{a}
Express \left(-\frac{h}{a}\right)\left(3k+63\right) as a single fraction.
\frac{-3hk-63h}{a}
Use the distributive property to multiply -h by 3k+63.
\frac{-h\left(3k+63\right)}{a}
Express \left(-\frac{h}{a}\right)\left(3k+63\right) as a single fraction.
\frac{-3hk-63h}{a}
Use the distributive property to multiply -h by 3k+63.
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