daisy32 daisy32

19-08-2016
Mathematics

contestada

What's the square root 20

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cutelion918 cutelion918

19-08-2016

by using calculator, these are the answers:
√20 = 4.47213595499958

√18 = 4.24264068711928

but without calculator,

√20 = √(4x5)
= √4 x √5
= 2 x √5
= 2√5

√18 = √(9x2)
= √9 x √2
= 3 x √2
= 3√2

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