Simplify x(3x+y)

$x (3 x + y)$

Step 1

Apply the distributive property.

$x (3 x) + x y$

Step 2

Rewrite using the commutative property of multiplication.

$3 x \cdot x + x y$

Step 3

Multiply $x$ by $x$ by adding the exponents.

Move $x$ .

$3 (x \cdot x) + x y$

Multiply $x$ by $x$ .

$3 x^{2} + x y$