Square root of 144 is 12
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7.135 * * * * * sqrt(18)*sqrt(8) = sqrt(18*8) = sqrt(144) =12
Negative numbers have no real square roots.-144 has two square roots: 12i and -12i.
sqrt(144) = 12. 12 is the ratio of 12 to 1, so it's nice and rational.
sqrt(a)+sqrt(b) is different from sqrt(a+b) unless a=0 and/or b=0. *sqrt=square root of
sqrt(18) - sqrt(8) = sqrt(2)