How do you factor completely $5x^2-10x-15$ ?

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Answer 1 · 2015-12-02T03:25:16

$5x^2-10x-15=5(x+1)(x-3)$

$5x^2-10x-15$

Factor out the GCF 5.

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

Factor $(x^2-2x-3)$ . (Keep the $5$ .)

$5(x+1)(x-3)$

How do you factor completely 5x^2-10x-155x^2-10x-15?