my attempt: I divide everything by 2 so that I end up with
I then use quadratics formula and results are:
The answer is suppose to be n = 4, what did I do wrong?
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Hint: n^2 - 7 = (7-n)^2 not (7-n^2).
oh, I typed it in wrong, that's what I meant. You end up with with n^2 - 7 = (7-n)^2
Now try collecting terms and simplifying to get a value of n (use the quadratic formula).
well u did a basic mistake....
n^2 term cancels on both sides yielding 14n-56 =0 that is n=4 which is reqd. answer...
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