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Mathematics 7 Online
OpenStudy (anonymous):

Will medal and fan.

OpenStudy (anonymous):

Solve the equation \[\sqrt{x+4}-3=1\] for the variable. Show each step of your solution process.

OpenStudy (anonymous):

@welshfella @ankit042 @Loser66 @DarkMoonZ @Nnesha

OpenStudy (welshfella):

first add 3 to both sides of the equation then square both sides

OpenStudy (welshfella):

then its easy

OpenStudy (anonymous):

Ok so \[\sqrt{x+4+3}-3=1+3\] So \[\sqrt{x+4}=4\]

OpenStudy (anonymous):

And the \[\sqrt{x^2+16}=16\]

OpenStudy (anonymous):

@welshfella

OpenStudy (welshfella):

No when you 'square the square root' of something the answer is that something. for example sqrt 4 squared = 4

OpenStudy (anonymous):

So take away the square root thing?

OpenStudy (anonymous):

So just x+4 = 4

OpenStudy (welshfella):

yea - so what do you get after sqrt(x + 4) = 4

OpenStudy (welshfella):

no not x + 4 = 4 - BOTH SIDES of the equation must be squared

OpenStudy (anonymous):

I'm not following, what would the left side be?

OpenStudy (welshfella):

the keft side is x + 4 - that is correct but the right side must also be squared - the 4

OpenStudy (anonymous):

So the right side is 16?

OpenStudy (welshfella):

yes

OpenStudy (anonymous):

x + 4 = 16

OpenStudy (welshfella):

x + 4 = 16

OpenStudy (anonymous):

Ah because it wasn't under the square root sign.

OpenStudy (welshfella):

gotta go I think you got it now

OpenStudy (welshfella):

yea

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