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Anonymous
20 and -20
Bobby Witting ∙
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The square root of 400 is 20.
20 times 20 is 400.
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-20 is also a square root of 400.
Wiki User
20i, where "i" is the imaginary unit.
The answer is 20 because 20 x 20 is 400
Adalgise Sena ∙