Question

Сократите пож-ста)$\frac{y ^{2}-9x ^{2} }{18x^{2}-6xy }$

Answer 1

$\frac{y^2-9x^2}{18x^2-6xy}= \frac{(y-3x)(y+3x)}{-6x(y-3x)}=- \frac{y+3x}{6x}$