Solve 3x ^ 2 - 27 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$3x^{2}-27$$

Factor

$3\left(x-3\right)\left(x+3\right)$

Solution Steps

Factor out $3$.

$$3\left(x^{2}-9\right)$$

Consider $x^{2}-9$. Rewrite $x^{2}-9$ as $x^{2}-3^{2}$. The difference of squares can be factored using the rule: $a^{2}-b^{2}=\left(a-b\right)\left(a+b\right)$.

$$\left(x-3\right)\left(x+3\right)$$

Rewrite the complete factored expression.

$$3\left(x-3\right)\left(x+3\right)$$

Evaluate

$3\left(x^{2}-9\right)$