Question

3√2 - 2√18 + 3 √72

a ( ) 3√2
b ( ) 24√2
c ( ) 15√2
d ( ) - 15√2

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Answer 1

$3 \sqrt{2} - 2 \sqrt{18} + 3 \sqrt{72} \\ 3 \sqrt{2} - 6 \sqrt{2} + 18 \sqrt{2} \\ 15 \sqrt{2}$

""alternativa c""