Answer:
5(2x + 3)
Explanation:
\begin{gathered}10x + 15 \\ \\ = 2 \times 5 \times x + 3 \times 5 \\ ( take \: common \: factors \: out )\\ = 5(2 \times x + 3) \\ \\ = 5(2x + 3)\end{gathered}
10x+15
=2×5×x+3×5
(takecommonfactorsout)
=5(2×x+3)
=5(2x+3)