A quadratic function in three variables x y and z contains exclusively terms x 2 y 2 z 2 xy xz yz x y z and a constant. The standard form of a quadratic is y ax 2 bx c where a b and. Ax 2 bx c 0.
What is a quadratic function A quadratic function is a polynomial function of degree 2.
Our job is to find the values of a b and c after first observing the graph. Positive there are 2 real solutions. The standard form of a quadratic is y ax 2 bx c where a b and. Lets start with the simplest case.