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Mathematics 8 Online
OpenStudy (anonymous):

solve √x+4=10

OpenStudy (anonymous):

First, subtract 4 from both sides. What do you get?

OpenStudy (anonymous):

You need to get the unknown to one side of the equation. Thus Subtract 4 form both sides. Then square both sides to get your answer.

OpenStudy (anonymous):

I got 6 if I did it right

OpenStudy (anonymous):

Is the square root over just x or is it over x+4?

OpenStudy (anonymous):

it's over the x + 4

OpenStudy (anonymous):

Okay, then you need to square both sides \[\sqrt(x+4)^2 = 10^2\]

OpenStudy (anonymous):

That eliminates the square root on the left, and what are you left with?

OpenStudy (anonymous):

So am I left with the 10^2?

OpenStudy (anonymous):

On the right side you have 10^2, which is 10x10 and I'm pretty sure you know what that is :) Squaring both sides eliminated the square root, so you're left with x+4=100

OpenStudy (anonymous):

Does that make sense?

OpenStudy (anonymous):

√x+4=10 √x+4-4=10-4 √x=6 (√x)^2=6^2 x=36

OpenStudy (anonymous):

@boyb39 She said the square root is over x+4. So it's sqrt(x+4)=10. You have to eliminate the square root first.

OpenStudy (anonymous):

ok i did not see that sorry @girlnotonfire

OpenStudy (anonymous):

No worries, I was just letting you know :)

OpenStudy (anonymous):

fixed \[\sqrt{(x+4)}=10\] \[\sqrt{(x+4)} ^2=10^2\] \[x+4=100\] \[x=100-4\] x=96

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