Keystone Test Keystone Algebra: Polynomials and Quadratic Functions 2

Question 1

Which method can be used to find the roots of any quadratic equation?

Accepted Answer

Quadratic formula

Answer

Only factoring

Answer

Only graphing

Answer

Long division

Question 2

What does the discriminant b² − 4ac tell you about a quadratic equation?

Accepted Answer

The number and type of solutions

Answer

The vertex of the parabola

Answer

The y-intercept

Answer

The axis of symmetry

Question 3

What is the axis of symmetry of y = 2x² − 8x + 3?

Accepted Answer

x = 2

Answer

x = −2

Answer

x = 4

Answer

x = 8

Question 4

Which of the following correctly factors 2x² + 7x + 3?

Accepted Answer

(2x + 1)(x + 3)

Answer

(2x + 3)(x + 1)

Answer

(x + 3)(x + 1)

Answer

(2x − 1)(x − 3)

Question 5

A parabola opens downward when the leading coefficient a is:

Accepted Answer

Negative

Answer

Positive

Answer

Zero

Answer

Equal to 1

Question 6

What is the degree of the polynomial 4x³ − 2x² + x − 7?

Accepted Answer

3

Answer

4

Answer

2

Answer

1