Question

Let f(x,y)=x²-3xy-y² Compute f(5,0) and f(5,-3).

Answer 1

Answer:

f(5, 0) = 25

f(5, -3) = 61

Step-by-step explanation:

f(x, y) = x² - 3xy - y²

⇒ f(5, 0) = (5)² - 3(5)(0) - (0)²

              = 25 - 0 - 0

              = 25

⇒ f(5, -3) = (5)² - 3(5)(-3) - (-3)²

              = 25 - 15(-3) - 9

              = 25 + 45 - 9

              = 61