Posted by sara on Tuesday, September 4, 2012 at 12:05am.
I tried solving these problems and get stuck . Can you please tell me what am I suppose to do next or did I do them all wrong
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. (x5)^2 = 30
√(x5)^2 = √30
x5 = ??

math  Steve, Tuesday, September 4, 2012 at 12:09am
for #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: x5 = ±√30
x = 5 ± √30

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