Question

Which of the following functions is quadratic?
O A. f(x) = 7x(x+3)
OB fx) = 5/x-1
O c. f(x) = 2^2
O D. f(x)=3(4 – x)

Answer 1

Answer:

A

Step-by-step explanation:

Quadratic functions include a squared x value, and by simplifying the equation to f(x)= 7x^2 + 21x, it is shown to be the only answer with a squared x.