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2k(-3k+4)+6(k^2+10)=k(4k+8)-2k(2k+5)
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2k(-3k+4)+6(k^2+10)=k(4k+8)-2k(2k+5)

User Agnaramon
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2k(-3k+4)+6(k^2+10)=k(4k+8)-2k(2k+5)
-6k^2+8k+6k^2+60=4k^2+8k-4k^2-10k
8k+60=8k-10
-10k=60
k=-6

User Chris Bacon
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