Algebra Examples

$3 x^{2} + 9 x - 30$

Step 1

Factor $3$ out of $3 x^{2} + 9 x - 30$ .

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Step 1.1

Factor $3$ out of $3 x^{2}$ .

$3 (x^{2}) + 9 x - 30$

Step 1.2

Factor $3$ out of $9 x$ .

$3 (x^{2}) + 3 (3 x) - 30$

Step 1.3

Factor $3$ out of $- 30$ .

$3 x^{2} + 3 (3 x) + 3 \cdot - 10$

Step 1.4

Factor $3$ out of $3 x^{2} + 3 (3 x)$ .

$3 (x^{2} + 3 x) + 3 \cdot - 10$

Step 1.5

Factor $3$ out of $3 (x^{2} + 3 x) + 3 \cdot - 10$ .

$3 (x^{2} + 3 x - 10)$

Step 2

Factor.

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Step 2.1

Factor $x^{2} + 3 x - 10$ using the AC method.

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Step 2.1.1

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 10$ and whose sum is $3$ .

$- 2, 5$

Step 2.1.2

Write the factored form using these integers.

$3 ((x - 2) (x + 5))$

Step 2.2

Remove unnecessary parentheses.

$3 (x - 2) (x + 5)$