How do you factor by grouping $x^3+5x^2-6x-30$ ?

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Answer 1 · 2015-04-11T01:59:10

Collect $x$ between the first and third term and $5$ between the second and fourth:
$x(x^2-6)+5(x^2-6)$
Collect $(x^2-6)$ to get:
$(x^2-6)(x+5)$

How do you factor by grouping x^3+5x^2-6x-30x^3+5x^2-6x-30?