GRE Problem Solving Question 526
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Source: Magoosh
For all numbers x and y, the operation фis defined by x ф y = (x+y)*(x-y) + (y-x)*(y+x) +x*y. What is the value of (sqrt12)ф(sqrt3)?
- A 6
- B 12
- C 18
- D 24
- E 36