03-05-2017
Mathematics

contestada

K2-4K-21. How do you factor this

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apologiabiology apologiabiology

03-05-2017

assuming yo mean
k²-4k-21

factor by doing
what 2 numbers multipily to get -21 and add to get -4?
-7 and 3

(k-7)(k+3) is factored

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