Question

Which of the following is a quadratic function?
A. y=(x+2)(2x-3)
B. y= 3(x-4)
C. y= 1/x^2
D. y= x(x-4)(x+3)

Answer 1

A. y=(x+2)(2x-3)

Notice when you multiply through, the highest power of x is 2, from the 2x^2 term.

Answer 2

Ohhh makes sense now, thank you