SOLUTION: solve f(x)= 2x squared + 2x-4

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Question 285571: solve f(x)= 2x squared + 2x-4
Answer by Deina(147) About Me  (Show Source):
You can put this solution on YOUR website!
solve +f%28x%29=+2x%5E2+%2B+2x+-4+
since this is in the form of +ax%5E2+%2B+bx+%2B+c+=+0+, I would simply solve it using the quadratic formula:
+x%5B1%2C+2%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2a+

using your data in () it would be:
+x%5B1%2C+2%5D+=+%28%282%29%2B-sqrt%28+%282%29%5E2-4%282%29%28-4%29+%29%29%2F2%282%29+

solving that for +x%5B1%5D+ and +x%5B2%5D
will give you your 2 answers and bob's your uncle!