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23. 10c2 - 21c = -4c + 6
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23. 10c2 - 21c = -4c + 6

User Alexander Burov
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1 Answer

3 votes

Answer:

c = 2 or c = -3/10

Explanation:

23. 10c2 - 21c = -4c + 6

10*cc - 21c = -4c + 6

10cc - 21c + 4c - 6 = 0

10cc - 17c - 6 = 0

c = 17/20 + root (17*17 - 4*10 *(-6)) / 20

c = 17/20 + 23/20

c = 2 or c = -6/20 = -3/10

User Robert Fey
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