Question

Question 3(iii)
Work out the following divisions
$10y(6y+21)÷5(2y+7)$

Answer 1

$10y(6y+21)÷5(2y+7)=\frac{2\times 5\times y[2\times 3\times y+3\times 7]}{5(2y+7)}=\frac{2\times 5\times y\times 3(2y+7)}{5(2y+7)}=6y$