Question

a function, $f$, is defined by $f(x,y)=3x^2 - 4y$. what is the value of $f(3,2)$?
a 0
b 10
c 19
d 24

Explanation:

Step1: Substitute $x=3, y=2$

$f(3,2) = 3(3)^2 - 4(2)$

Step2: Calculate squared term

$3(3)^2 = 3\times9 = 27$

Step3: Calculate linear term

$4(2) = 8$

Step4: Compute final value

$f(3,2) = 27 - 8$

Answer:

C. 19