Hey there!
f(x) = g(x) = h(x) = y
Since, you have the value of x (8), you can substitute it in the equation to make it easier to solve. We just have to find your f(x) value (also known as the y-value)
f(x) -0 -3 * x^2 - 2
f(x) = -3x^2 - 2
y = -3x^2 - 2
y = -3(8)^2 - 2
y = -3(8^2) - 2
y = -3(8 * 8) - 2
y = -3(64) - 2
y = -192 - 2
y = -194
Therefore, your answer should be:
f(x) = -194
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)