sqrt of 20 = 4 and 1/2 or 4.5 (to the nearest tenth)
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The square root of 20 simplified is ±4.5
The square root of 484 is 22. An easy trick to find this out is to round down to the nearest large whole number. In this case, that is 400, the square root of which is 20. If 20 x 20 = 400, what does 21 x 21 equal? Turns out that's 441. Move up to 22 x 22. There you have your answer!
The square root of 400 is 20, as 20 multiplied by 20 equals 400. The square root of 196 is 14, as 14 multiplied by 14 equals 196. Therefore, the expression simplifies to 20 - 14, which equals 6.
square root of (6 x 20) = square root of (120) = 10.95
4.4721359549995793928183473374626 and -4.4721359549995793928183473374626 The cube root of 400 is also equal to the square root of 20. (IIRC) Another way to approach it: √(20)=√(4x5) =2√(5)