Question

задание закрепил.. .​

Answer 1

$\displaystyle\bf\\-\frac{2a^{2} }{b} :\frac{6a^{2} }{b^{2} } =-\frac{2a^{2} }{b} \cdot\frac{b^{2} }{6a^{2} } =-\frac{2a^{2} }{b} \cdot\frac{b\cdot b}{2a^{2} \cdot 3} =-\frac{b}{3}$