Simplify 3a(2+5b)

$3 a (2 + 5 b)$

Step 1

Apply the distributive property.

$3 a \cdot 2 + 3 a (5 b)$

Step 2

Simplify the expression.

Multiply $2$ by $3$ .

$6 a + 3 a (5 b)$

Rewrite using the commutative property of multiplication.

$6 a + 3 \cdot 5 a b$

Multiply $3$ by $5$ .

$6 a + 15 a b$