Mathematics
7 Online
OpenStudy (pgxgirl103):
Solve for x?
√ x+3 =2
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OpenStudy (anonymous):
square both sides
OpenStudy (anonymous):
Assuming that the prob. is √(x+3) = 2 (NOT, √x + 3 = 2 )
OpenStudy (pgxgirl103):
yes sorry and square x and 3?
OpenStudy (anonymous):
A quick example of squaring both sides...
√(b-4)=2
[ √(b-4) ] ² = 2 ²
b - 4 = 4
b = 8
OKAY? Can you do your problem similarly ?
OpenStudy (anonymous):
Squaring both sides, means to raise each (entire) side (of the equation) to the second power.
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OpenStudy (pgxgirl103):
√ (x+3)^2=2^2
is that right?
OpenStudy (anonymous):
Yes !!!
OpenStudy (anonymous):
What are you getting :) ?
OpenStudy (pgxgirl103):
I don't know what to do next.
OpenStudy (anonymous):
What will the equation look like after you square both sides (you started it well, go on !)
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OpenStudy (pgxgirl103):
3 squared is 9 and 2 squared is 4.
OpenStudy (anonymous):
√ (x+3) ² =2 ²
√ (x+3) ² = x+3
2 ² = 4
So, ...
x+3=4
and the last step ?
OpenStudy (pgxgirl103):
you do 4-3? which equals 1 so x=1?
OpenStudy (pgxgirl103):
@student_basil
OpenStudy (anonymous):
yes, you got it, correct, x=1 .
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OpenStudy (pgxgirl103):
thanks!