Answer
The function [tex]f(x)=9x^2+4x-2[/tex] is a quadratic function.
Linear functions are the functions having the highest power as one, whereas the quadratic functions have two as the highest power. On the other hand, the function which has the form of [tex]f(x)=\text{e}^x[/tex] is known as an exponential function.
The function [tex]f(x)=9x^2+4x-2[/tex] has the highest power of [tex]2[/tex].
Thus, the function [tex]f(x)=9x^2+4x-2[/tex] is a quadratic function.
Learn more about quadratic functions here- https://brainly.com/question/5975436
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