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August 1, 2015

Homework Help: math... Ms, Sue can you help?

Posted by miss b on Wednesday, December 19, 2012 at 8:47pm.

Apparently, I got this question wrong on a test and I'd like to know what error I made... can you help?

Here's what I did:

2b^2+b=6
b^2+1/2b=3
b^2+1/2b+(1/2)^2=3+(1/2)^2
(b+1/2)^2=3+1/4
b+1/2=+/- <13/4>
b=-1/2+/-<13>/2
b=(-1+/-<13>)/2

<> means its in a radical and +/- means plus or minus

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