SOLUTION: Solve the equation by the method of your choice. 7x2 - 21 = 0

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Question 470015: Solve the equation by the method of your choice.
7x2 - 21 = 0
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
You copied it wrong, it should be
7x%5E2+-+21+=+0
7x%5E2+=+21
x%5E2+=+3
x=+%2B-+sqrt%283%29