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

User AlanKley
by
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1 Answer

1 vote
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
User AhmadMarafa
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