Simplify 14x^5y^2(5y)

$14 x^{5} y^{2} (5 y)$

Multiply $y^{2}$ by $y$ by adding the exponents.

Move $y$ .

$14 x^{5} (y \cdot y^{2}) \cdot 5$

Multiply $y$ by $y^{2}$ .

Raise $y$ to the power of $1$ .

$14 x^{5} (y^{1} y^{2}) \cdot 5$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$14 x^{5} y^{1 + 2} \cdot 5$

Add $1$ and $2$ .

$14 x^{5} y^{3} \cdot 5$

Multiply $5$ by $14$ .

$70 x^{5} y^{3}$