Question

Given P(x, y) = x2 + xy + y2 and Q(x, y) = x2 – xy + y2. Then, the value of P(2, Q(1, 3)) is

Answer 1

Step-by-step explanation:

Q(1,3)= (1^2 - 1×3 + 3^2

= 1 - 3 + 9

= 7

P(2, Q(1,3)) = P(2, 7)

= 2^2 + 2 × 7 × 7^2

= 4 + 14 + 49

= 67

Hope this helps