Quiz about Quizizz 3.3_Quadratic Function

Question 1

What is the first step to solving THIS equation by completing the square?
x² + 10x + 21 = 0

Accepted Answer

Subtract 21 for both sides of the equation

Answer

Set the equation equal to zero

Answer

Divide 10 by 2 and add the result to both sides

Answer

Add a² and 10a together

Question 2

Given the perfect square trinomial, identify the equivalent expression

x²+14x+49

Accepted Answer

(x+7)2

Answer

(x+14)2

Answer

(x+49)2

Answer

(x-7)2

Question 3

What is the vertex of the given function?

Accepted Answer

(3, 1)

Answer

(-3, -1)

Answer

(3, -1)

Answer

(-3, 1)

Question 4

What is the next step after the following equation?

$$x^2-12x+36\ \ =\ \ \ -11+36$$

Accepted Answer

$$\left(x-6\right)^2=25$$

Answer

$$\left(x+12\right)^2=25$$

Answer

$$\left(x-12\right)^2=25$$

Answer

$$\left(x+6\right)^2=25$$

Question 5

What is the vertex of the function y = (x - 3)² + 5

Accepted Answer

(3, 5)

Answer

(-3, 5)

Answer

(3, -5)

Answer

(-3, -5)

Question 6

Which quadratic function is represented by the graph?

Accepted Answer

y = (x + 2)² + 2

Answer

y = (x - 2)² + 2

Answer

y = (x - 2)² - 2

Answer

y = -(x - 2)² + 2

Question 7

Which quadratic function is represented by the graph?

Accepted Answer

y = -(x - 1)² - 4

Answer

y = -(x + 1)² - 4

Answer

y = -(x + 1)² + 4

Answer

y = (x + 1)² + 4

Question 8

If given the equation y = 3(x + 5)² - 4, what is the vertex of the parabola?

Accepted Answer

(-5, -4)

Answer

(5, -4)

Answer

(-15, -4)

Answer

(15, -4)

Question 9

A parabola has a vertex at (-3, 2). Where is the axis of symmetry?

Accepted Answer

x = -3

Answer

y = -2

Answer

x = 3

Answer

y = 2

Question 10

What are the green dots called? Select ALL that applies.

Accepted Answer

zeros of function

Accepted Answer

x-intercepts

Answer

axis of symmetry

Answer

vertex

Answer

parabola

Question 11

Which of the following are quadratic functions with a vertex of (-1,2)? Select all that apply.

Accepted Answer

$$y=4\left(x+1\right)^2+2$$

Accepted Answer

Option D is correct

Answer

$$y=-3\left(x-1\right)^2+2$$

Answer

$$y=-5\left(x-2\right)^2-1$$

Answer

E.

Question 12

To solve the equation $$x^2-8x=9$$ by completing the square, what number will I add to both sides of the equation?

Accepted Answer

16

Answer

64

Answer

4

Answer

81

Question 13

Does the graph of the function

y = -2(x + 5)² + 2

have a minimum or a maximum?

Accepted Answer

Maximum

Answer

Minimum

Answer

It has neither.

Answer

It has both.

Quizizz 3.3_Quadratic Function

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