What is the square root of 2.25?

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Answer 1 · 2015-11-13T19:49:59

$1.5$

$15^2 = 225$ , so $2.25 = 225/100 = 225/(10^2)$

and $sqrt(2.25) = sqrt((15^2)/(10^2)) = 15/10 = 1.5$

Answer 2 · 2015-11-13T20:04:11

Alternative approach.
$sqrt(2.25) -> sqrt(9/4) -> sqrt(9)/sqrt(4) -> 3/2 ->1.5$

Some situations one way works well and at another time it is not so good. To have several approaches is good