Square Root of 400 (√400 = 20)

Exact Answer

√400 = 20

Principal Root (√400)

Real Roots

±20

Perfect Square?

Yes (20²)

Exponential Form

400^(1/2)

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Step-by-Step Solution: √400 = 20

Step 1

The square root of 400 is the number y such that y × y = 400.

√400 = 20

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Yes, 400 is a perfect square because 20 × 20 = 400.