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January 27, 2015

January 27, 2015

Posted by **sara** on Tuesday, September 4, 2012 at 12:05am.

1. (x+5)^2 = (x+4)^2

√(x+5)^2 = √(x+4)^2

x+5 = x+4

?

2. (4x+7)^2 = 144

√(4x+7)^2 = √144

4x+7 = 12

?

3. (x-5)^2 = 30

√(x-5)^2 = √30

x-5 = ??

- math -
**Steve**, Tuesday, September 4, 2012 at 12:09amfor #1, you also have to consider

x+5 = -(x+4)

2x = -9

x = -9/2

#2: 4x+7 = ±12

x = 5/4 or -19/4

#3: x-5 = ±√30

x = 5 ± √30

- math -
**sara**, Tuesday, September 4, 2012 at 12:39amfor #1, where did you get the negative for - ( x+ 4 )

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