Question

$\frac{8a}{7b} \times \frac{7a {}^{2} }{ - 2}$

Answer 1

$\bf \cfrac{8a}{7b}\times \cfrac{7a^2}{-2}\implies \cfrac{8a\times 7a^2}{7b\times -2}\implies \cfrac{56a^3}{-14b}\implies \cfrac{4a^3}{-1b}\implies -\cfrac{4a^3}{b}$