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How do you factor #2h^3+h^2-18h-9# by grouping?

1 Answer

Jul 30, 2016

#=(2h+1)(h+3)(h-3)#

Explanation:

#2h^3+h^2-18h-9#
#=h^2(2h+1)-9(2h+1)#
#=(2h+1)(h^2-9)#
#=(2h+1)(h+3)(h-3)#

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