Question

Select all of the following that are quadratic functions

Answer 1

Any function is quadratic whose highest degree is 2, it means we should have x² or y² as the only highest degree term.

Note:- We do not consider x³ or y³ because it will make cubic equations.

So from the given options, we can select followings:-

x = 3y² -6y +5

y +3 = -2x² +5

y = 2x² -8x +6

y = 5·x·(x + 9) -8 = 5x² +45x -8

y - 2x² = 3x -2x² +4

Explanation:

Answer 2

B, C, F

Explanation:

It's the right answer.