Posted by Sarah on Thursday, November 12, 2009 at 10:15pm.
Complete the square to Solve Quadratic Equation:
Solve the equation. Express the answer in simplest radical form.
x^27x=11
Please Help!!!! Thanks.

trigonometry  Reiny, Thursday, November 12, 2009 at 10:20pm
x^27x=11
x^2  7x = 11
x^2  7x + 49/4 = 11 + 49/4
(x  7/2)^2 = 44/4 + 49/4
x  7/2 = ± √93/2
x = (7 ±√93)/2

trigonometry  Sarah, Thursday, November 12, 2009 at 10:24pm
Thank you so much, but I was wondering:
x^27x=11
x^2  7x = 11
You have to divide by 1, wouldn't it be positive 7x.

trigonometry  Reiny, Thursday, November 12, 2009 at 10:25pm
YOU ARE RIGHT!
good for you for catching that.
I am sure you can make the necessary changes.
(there is one small change)

trigonometry  drwls, Thursday, November 12, 2009 at 10:27pm
This is not a trigonometry question.
x^2 + 7x + (7/2)^2 = 11 + (7/2)^2
(x + 7/2)^2 = 23 1/4
x = 7/2 +/ sqrt(93)/2

trigonometry  Sarah, Thursday, November 12, 2009 at 10:30pm
Thank you so much!!!!
Could you please help me with another type of trig math question. I greatly appreciate your help.
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