Quiz about Quadratics Review (Unit 6)

Question 1

What is the y-intercept of the equation
y = 2x²+ 8x + 3?

Accepted Answer

Answer

(3,0)

Answer

(0,2)

Answer

y=8

Question 2

What is the vertex of the graph?

Accepted Answer

(3, -1)

Answer

(2, 4)

Answer

(0, 8)

Answer

(4, 2)

Question 3

What are the green dots called?

Accepted Answer

roots or x-intercepts

Answer

axis of symmetry

Answer

vertex

Answer

parabola

Question 4

Find the axis of symmetry of the following equation: y = 2x²+ 8x + 3

Accepted Answer

x = -2

Answer

x = -4

Answer

x = 2

Answer

x = 0

Question 5

Solve the quadratic equation by factoring: x²- 3x - 10

Accepted Answer

x = 5, x = -2

Answer

x = 2, x = 5

Answer

x = 10, x = -1

Answer

x = 3, x = -4

Question 6

Solve by using square roots

3x² + 12 = 60

Accepted Answer

x = 4 or x = -4

Answer

x = 5

Answer

x = 0

Answer

x = 3 or x = -3

Question 7

Solve the equation using square roots:

(x - 2)² = 49

Accepted Answer

x = 9, x = -5

Answer

x = -3, x = -2

Answer

x = 4, x = -7

Answer

x = 7, x = -7

Question 8

$$2x^2-5x+3\ =\ 0$$

A student attempted to solve this equation with the quadratic formula. Which of these is set up correctly?

Accepted Answer

$$x\ =\frac{-\left(-5\right)\pm\sqrt{\left(-5\right)^2-4\left(2\right)\left(3\right)}}{2\left(2\right)}$$

Answer

$$x=\frac{-5\pm\sqrt{5^2-4\left(2\right)\left(3\right)}}{2\left(2\right)}$$

Answer

$$x=\frac{-5\pm\sqrt{\left(-5\right)^2-4\left(2\right)\left(3\right)}}{2\left(2\right)}$$

Question 9

Use the quadratic formula to find the solutions for
2x² - 9x + 5 = 0

Accepted Answer

0.65 and 3.85

Answer

-8.14 and 6.14

Answer

-4.07 and 3.07

Answer

no real solutions

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