Algebra 2 Midterm

What does i^2 equal?

A rock falls from a 500 foot overhang into the lake below. Its fall can be modeled by the function: f(x)=-16x^2+500. How many seconds does it take to hit the surface of the water? (Round to the nearest tenth of a second)

Simplify: \sqrt[]{-25}

What is the y-intercept of the function f(x) = 2(x - 5)^2 + 12?

Factor Completely: x^2 - 7x - 8

What is the definition of a quadratic function?

What is the vertex of the parabola given by the function f(x) = 2(x - 5)^2 + 12?

What is the standard form of a quadratic equation?

What is the discriminant in a quadratic equation?

What does a negative discriminant indicate?