SOLUTION: The question is 4x^2 - 20 = 5. I know that I have done these recently but I am drawing a blank.

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Question 7013: The question is 4x^2 - 20 = 5. I know that I have done these recently but I am drawing a blank.
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E2+-+20+=+5
4x%5E2+=+25
x%5E2+=+25%2F4
x+=+sqrt%2825%2F4%29 or x+=+-+sqrt%2825%2F4%29
x+=+sqrt%2825%29%2Fsqrt%284%29 or x+=+-+sqrt%2825%29%2Fsqrt%284%29
x+=+5%2F2 or x+=+-+5%2F2

jon.