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

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