Question

Answer Q6,7,8,9 with explanation

Answer 1

$= ( {4 }^{2} - {2}^{2} ) \times ({\frac{2}{3} )}^{ - 2} \\ = (16 - 4) \times ({\frac{2}{3} )}^{ - 2} \: \\ = 12 \times ({\frac{2}{3} )}^{ - 2} \: \\ = 12 \times \frac{ {2}^{ - 2} }{ {3 }^{ - 2} } \\ = {2}^{2} \times 3 \times {2}^{ - 2} \times {3 }^{2} \\ = {2}^{2 - 2} \times {3}^{2 + 1} \\ = {3}^{3} \\ = 27$