Question

\(\sqrt{29^2-20^2}\)

Answer 1

\(\sqrt{29^2-20^2}\\ =\sqrt{\left(29-20\right)\left(29+20\right)}\\ =\sqrt{9.49}\\ =\sqrt{9}.\sqrt{49}\\ =3.7\\ =21\)

Answer 2

\(\sqrt{29^2-20^2}=\sqrt{841-400}=\sqrt{441}=21.\)

Answer 3

`sqrt{29^2 - 20^2)`

`=sqrt{(29+20)(29-20)`

`= sqrt{49.9} = sqrt{9} . sqrt{49}`

`= 3.7=21`