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2 Answers

0 votes
answered ago by

We indicate ± because the question can be either plus or minus ....U see the sign even talks on it own thus plus or minus

0 votes
answered ago by

It is because for eg. +2*+2=4  and -2*-2=4. Note: + is positive and - is negative. So to get √4 the answer should be either +2 or -2.

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