2 3/5 = 13/5
as a radical:
√132/52 = √169/25 because
√169/25 = √169/√25 = 13/5 = 2 3/5
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2 radical 30
Three times the fifth root of three.
Here is an example, radical 20 plus radical 5. Now radical 20 is 2(radical 5) so we can add radical 5 and 2 radical 5 and we have 3 radical 5.
-2 √5 + 3 √5 = (-2 + 3) √5 = 1 √5 = √5
2/3 = sqrt( 4/9 )