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OpenStudy (anonymous):
Factor completely: -5k2 + 20k - 30
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OpenStudy (anonymous):
-5k^2 + 20k - 30=(20-5 k) k-30=-5 ((k-4) k+6)=-5 (k-2)^2-10
OpenStudy (anonymous):
\[-5 (-i k+\sqrt(2)+2 i) (i k+\sqrt(2)-2 i)\]
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