Question

помогите!!!!!!!!!!!!!!!

Answer 1

$( \frac{1}{5} x) {}^{2} - ( \frac{2}{11} y) {}^{2} \\ \frac{1}{25} x {}^{2} - \frac{4}{121} y {}^{2}$

Answer 2

$(\frac{1}{5}x-\frac{2}{11} y) * (\frac{1}{5}x +\frac{2}{11} y) = (\frac{1}{5} x)^{2} - (\frac{2}{11}y)^{2} = \frac{1}{25} x^{2} -\frac{4}{121} y^{2}$