If x ¤ y = (x + y)^2 - (x - y)^2. Then √3 ¤ √3 =  Choices
A) 0 B) 5 C) 12 D) 15 E) 20
X = √3 and Y also =√3   Applying the function (√3+√3)^2 - (√3-√3)^2 = (2√3)^2 - 0 = 4 x 3 = 12.   Note: Alternative Approach is the entire function is represented as X^2 - Y^2 = (X+Y)(X-Y) which can be simplified as (x+y+x-y)(x+y-(x-y)) = (2x)(2y)=4xy. Substituting x=√3 and y = √3 you get the answer 12.   Answer 12
<result>C</result>
If x ¤ y = (x + y)^2 - (x - y)^2. Then √3 ¤ √3 =