Simplify 6x*6x^3

$6 x \cdot 6 x^{3}$

Rewrite using the commutative property of multiplication.

$6 \cdot 6 x \cdot x^{3}$

Multiply $x$ by $x^{3}$ by adding the exponents.

Move $x^{3}$ .

$6 \cdot 6 (x^{3} x)$

Multiply $x^{3}$ by $x$ .

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

$6 \cdot 6 (x^{3} x^{1})$

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

$6 \cdot 6 x^{3 + 1}$

Add $3$ and $1$ .

$6 \cdot 6 x^{4}$

Multiply $6$ by $6$ .

$36 x^{4}$