Question

calcule (5L³).(-2/5L)

Answer 1

$(5 {l}^{3} ) \times ( - \frac{2}{5} l) = (5) \times ( - \frac{2}{5} ) \times ( {l}^{3} ) \times (l) \\ \\ - \frac{5 \times 2}{5} \times {l}^{3 + 1} \\ \\ - 2 {l}^{4}$