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Wednesday, June 15, 2011

Factorization

Question
Factor the expression.
50k cubed-40k squared+75k-60
Anyone know the answer?
 
Solution
50k^3 -40k^2 +75k -60
=5(10k^3 -8k^2 +15k -12)
=5k(2k(5k-4) +3(5k-4))
=5k(2k + 3) (5k -4)

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