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first the two numbers have the same radicand which is radical 2 so we just add the numbers before them to become 7 radical 2
factor the 18. 18=2x3x3. Take out the 3 because it is squared. 5x3 radical 2=15radical2
9*radical(3)/2 = 4.5*radical(3) = 7.794 approx.
36
4 x2