For real numbers a and b, define a \$ b=(a-b)^{2}. What is (x-y)^{2} \$(y-x)^{2} ?
Answer Choices
A. 0
B. x^{2}+y^{2}
C. 2 x^{2}
D. 2 y^{2}
E. 4 x y
For real numbers a and b, define a \$ b=(a-b)^{2}. What is (x-y)^{2} \$(y-x)^{2} ?
Answer Choices
A. 0
B. x^{2}+y^{2}
C. 2 x^{2}
D. 2 y^{2}
E. 4 x y