Question

срочно!!!!!!!!!!!!!!!!!!!

Answer 1

$\frac{1}{49} x {}^{2} - \frac{16}{121} y {}^{2} = ( \frac{1}{7} ) {}^{2} x {}^{2} - (\frac{4}{11} ) {y}^{2} = ( \frac{1}{7} x - \frac{4}{11} y)( \frac{1}{7} x + \frac{4}{11} y)$