Would √x+6 -4 = x be an extraneous solution? The x + 6 are under the radicands line.

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It could have extraneous solution. When you do the "square both sides" thing to get rid of the radical, you need to check.

SW-User

@FrozenWasteland arghhh I forget how to do all this

FrozenWasteland · 61-69, M

@SW-User Mr. qW shows his (excellent) work below.

SW-User

@FrozenWasteland He's excellent in a lot. I've known him for a long time.
He's a Dollbaby