Simplify x*3x

$x \cdot 3 x$

Rewrite using the commutative property of multiplication.

$3 x \cdot x$

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

Move $x$ .

$3 (x \cdot x)$

Multiply $x$ by $x$ .

$3 x^{2}$

$3 x^{2}$

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