5√2*5√2=5*5*√2*√2=5*5*2=25*2=50
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2 times radical 5 or about 4.472135955
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 radical 30
-2 √5 + 3 √5 = (-2 + 3) √5 = 1 √5 = √5
3√250 = 15√10 The cube root of 250 is 5 times the cube root of 2.