Question

√21=? by showing full process

Answer 1

√16=4 and √25=5 and √21 is mid point between √16 and √25 . so √21 =4.5 .

Answer 2

$Hey \: friend \: we \: know \: that$

=> √21 = √7 * √3
=> √7 = 2.64.....
=> √3 = 1.73.....
= So √21 = 2.64.... * 1.73.....
=> √21 = 4.582.......

$Hope \: it \: helps\\ Please \: mark\: my\: answer\: as \:the \\ BRILLIANIST \\ ANSWER.$