Question

приагиите пожалуйста​

Answer 1

$\bf \Huge \sqrt{0.81 {x}^{7} {y}^{6} } = \sqrt{0.9 \times 0.9 \times {x}^{6} \times x \times {y}^{5} \times y} = 0.9 {x}^{6} {y}^{5}$