Let f(x,y)=x - 4xy-y. Compute f(3,0) and f(3,-7).f(3,0)= (Simplify your answer.)f(3,-7)= (Simplify your answer.) Let f(x,y)=x 4xy y2. Compute f(3,O) and f(3, 7). f(3,O)= 9

Let f(x,y)=x² - 4xy-y². Compute f(3,0) and f(3,-7).f(3,0)= (Simplify your answer.)f(3,-7)= (Simplify your answer.)

Let f(x,y)=x 4xy y2. Compute f(3,O) and f(3, 7). f(3,O)= 9 (Simplify your answer.) f(3, 7) = C] (Simplify your answer.)