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April 19, 2014

Homework Help: Math- Algebra II

Posted by Lala on Wednesday, February 16, 2011 at 8:34pm.

Please check if I did this right...


√(2x+1)+7= 3
-7 -7
√(2x+1)= -4
Square everything
√(2x+1)^2= -4^2
2x+1=16
-1 -1
2x=15
divide by 2 on both sides
x=7.5

CHECK: (Plug it in)

√(2(7.5)+1)+7= 3
√(16)+7= 3
4+7=3
11 doesn't equal 3
so the answer is no solution? right?

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