Extraneous solutions | Equations | Algebra 2 | Khan Academy

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Extraneous solutions are values that we get when solving equations that aren't really solutions to the equation. In this video, we explain how and why we get extraneous solutions, by understanding the logic behind the process of solving equations.

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[sambasivaraos]

Try to explain cancellation laws before multiplying both sides zero.

[guy]

where did the +4 come from when he squared it?

[sambasivaraos]

I think √1 is +1 or -1. I didn't got point