Question

3
$\frac{ {3}^{3} \div 27 }{ {17}^{0} \times {a}^{ - 2} }$

Answer 1

$\frac{ {27}^{1} \div 27 }{ {1}^{1} \times {a}^{ - 2} }$ = а^2
27÷27=1.
1•a={а}^{-2}
1/а^-2=а^2