Question

why does plus minus appear when taking square roots​

Answer 1

Hi,

here u go with ur answer...

To indicate that we want both the positive and the negative square root of a radicand we put the symbol ± (read as plus minus) in front of the root. ... The square roots of numbers that are not a perfect square are members of the irrational numbers. This means that they can't be written as the quotient of two integers.

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