Answer:

Explanation:
Quadratic function is in the form of
with largest exponent as 2
can be written as

is in the form of y=ax^2 + bx +c with largest exponent 2. so it is quadratic function.
. It is not quadratic because it has largest exponent 3.
. It is not quadratic because it has largest exponent 5.
It is not quadratic because it has largest exponent 3.