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

Mathematics

1 answer:

laila [671]3 years ago

7 0

Answer:

c = 2 or c = -3/10

Step-by-step 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

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