SOLUTION: How do I solve this? Please help c^2-7c-18=0 solution is c= thanks for your help!

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Question 473773: How do I solve this? Please help
c^2-7c-18=0
solution is c=
thanks for your help!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: 9 - 2 = 7