Question

$\sqrt{4}$
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Answer 1

Step-by-step explanation:

Step-by-step explanation:Considering the above example, +2 and -2 are square roots of 4 because 22 = (-2)2 = 4. A non-negative real number has a unique non-negative square root. It is called principal square root denoted by √a.

Answer 2

Step-by-step explanation:

• square root of 4 is 2.
• √4=2