Answer:
D
Explanation:
Using the rule of radicals
× ⇔
Given
( + 2 ) ← distribute
= 3 + 2
= 3 + (2 × 6)
= 3 + 12
= 15 → D
sqrt3[sqrt3+2sqrt12]=sqrt3[sqrt3+4sqrt3] = sqrt3[5sqrt3= 3x5 =15
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