$\frac{- 3 x y ^{4}}{x ^{3} y} \frac{7 x ^{2} z ^{3}}{6 y ^{3} z} = - \frac{21 x ^{3} y ^{4} z ^{3}}{6 x ^{3} y ^{4} z}$

Explanation

\frac{- 3 x y ^{4}}{x ^{3} y} \frac{7 x ^{2} z ^{3}}{6 y ^{3} z} \overset{◯}{1} - \frac{21 x ^{3} y ^{4} z ^{3}}{6 x ^{3} y ^{4} z}

①

Multiply $\frac{- 3 x y ^{4}}{x ^{3} y}$ by $\frac{7 x ^{2} z ^{3}}{6 y ^{3} z}$ to get $\frac{- 21 x ^{3} y ^{4} z ^{3}}{6 x ^{3} y ^{4} z}$ .

Step 1: Multiply numerators and denominators.

Step 2: Simplify numerator and denominator.

\frac{- 3 x y ^{4}}{x ^{3} y} \cdot \frac{7 x ^{2} z ^{3}}{6 y ^{3} z} Step 1 \frac{( - 3 x y ^{4} ) \cdot 7 x ^{2} z ^{3}}{x ^{3} y \cdot 6 y ^{3} z} = Step 2 \frac{- 21 x ^{3} y ^{4} z ^{3}}{6 x ^{3} y ^{4} z}

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$\frac{- 3 x y ^{4}}{x ^{3} y} \frac{7 x ^{2} z ^{3}}{6 y ^{3} z} = - \frac{21 x ^{3} y ^{4} z ^{3}}{6 x ^{3} y ^{4} z}$