Question

${10}^{2} = {x}^{2} \times {7}^{2}$

Answer 1

$10^{2} =x^{2}.7^{2}$

$x^{2} =\frac{10^{2}}{7^{2}}$

$x=\sqrt{\frac{10^{2}}{7^{2}}}=$ ±$\frac{10}{7}$