Question

Solutions of these questions.... ​

Answer 1

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Answer 2

${a}^{2} (2ab - 5c) \\ = 2 {a}^{3}b - 5 {a}^{2} c$

${( {6}^{ - 1} - {8}^{ - 1} )}^{ - 1} \\ = {( \frac{1}{6} - \frac{1}{8} ) }^{ - 1} \\ = {( \frac{4 - 3}{24} )}^{ - 1} \\ = {( \frac{1}{24} )}^{ - 1} \\ = 24$