Plug that into the quadratic equation and I get:
Which I can't find a way to simplify down.
The book shows the answer to be 21. How they got it, I have no idea. So any help will be greatly appreciated
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Originally Posted by mathgeek777
... From here, you should get
When solved you should get or . I'll let you test these values. Only one is correct.
The book answer is incorrect. 21 is not a possible solution for x.
Its amazing how i seem to miss the tiniest details....
Thanks for the help
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