CarlaByrdGore
(sq. root sign) x+3=10



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hartnn
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is it \(\sqrt x+3=10 \\or,\sqrt {x+3}=10 \)

CarlaByrdGore
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the second one

hartnn
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square both sides, what u get ?

CarlaByrdGore
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so it would be 103?

hartnn
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did you get x+3 =100 ?

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

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

CarlaByrdGore
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oh okay so it is 97

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

hartnn
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yes.

hartnn
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x+3 =100
since 3 is ADDED to x, we do inverse operation of SUBTRACTION to isolate x
since, x+33 = x+0 = x

CarlaByrdGore
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oh okay thank you I think I got it

hartnn
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welcome ^_^