Posted by shonye on Wednesday, February 13, 2013 at 11:44am.
Multiply (2y+7)(2y+7)
It is fine to divide both sides by 3 first, that will make the numbers a little smaller.
You will have (2y+7)(2y+7) = 27
After multiplying, you should have 3 terms = 27.
Subtract the 27 from both sides so that you will have a trinomial = 0. You can then factor to find two different values for x.
Are you okay from here?
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