Question

When in an equation and why both signs, positive as well as negative, is taken?? For example:- b^2=2 then b= +- root 2​

Answer 1

Answer:

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Step-by-step explanation:

i will explain that with an example.

2×2 is 4

-2 × -2 is also 4

when I take √4 ut can be +2 or -2

hence we write it as ± 2