Question

please tell step by step ​

Answer 1

$( \frac{2}{5} {a}^{2} b) \times ( - 15 {b}^{2} ac) \times ( - \frac{1}{2} {c}^{2} ) \\ = \frac{2}{5} \times - 15 \times - \frac{1}{2} \times {a}^{2} b \times {b}^{2} ac \times {c}^{2} \\ = 3 {a}^{3} {b}^{3} {c}^{3}$

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