## anonymous 3 years ago (sq. root sign) x+3=10

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1. hartnn

is it $$\sqrt x+3=10 \\or,\sqrt {x+3}=10$$

2. anonymous

the second one

3. hartnn

square both sides, what u get ?

4. anonymous

so it would be 103?

5. hartnn

did you get x+3 =100 ?

6. anonymous

yes and the add three to both sides and x = 103? right

7. hartnn

no, x+3 =100 to isolate 'x' , we need to SUBTRACT 3 from both sides, then what u get ?

8. anonymous

oh okay so it is 97

9. anonymous

that is where I get confused is whether to add or subtract

10. hartnn

yes.

11. hartnn

x+3 =100 since 3 is ADDED to x, we do inverse operation of SUBTRACTION to isolate x since, x+3-3 = x+0 = x

12. anonymous

oh okay thank you I think I got it

13. hartnn

welcome ^_^