Quiz about Quadratic Equations

Question 1

In the equation
y = x² +5x +7, match each leading coefficient with its correct letter

Accepted Answer

a=1, b=5, c=7

Answer

a=0, b=5, c=7

Answer

a=7, b=5, c=1

Question 2

What should you do first in solving this equation?
x² + 6x - 13 = 3

Accepted Answer

Make it equal 0 by subtracting 3 on each side

Answer

Get factored form

Answer

Write down: a=1, b=6, c=-13

Answer

Type it all in a calculator.

Question 3

Solve Using the Quadratic Formula
2x² + 7x - 15 = 0

Accepted Answer

-5 or 1.5

Answer

-1.5 or 5

Answer

No Solution

Answer

0.7 or 5

Question 4

Solve Using the Quadratic Formula
x² + 4x - 40 = -8

Accepted Answer

-8 & 4

Answer

-10 & -4

Answer

-4 & 10

Answer

8 & -4

Question 5

Solve by the Quadratic Formula:

$$9u^2-11u+7=0$$

Accepted Answer

$$\frac{11\pm\sqrt{131}}{18}$$

Answer

$$\frac{-11\pm\sqrt{131}}{18}$$

Answer

$$\frac{11\pm\sqrt{131}}{-18}$$

Answer

$$\frac{11\pm i\sqrt{373}}{18}$$

Question 6

Solve by the Quadratic Formula:

$$-12q^2+3q+7=0$$

Accepted Answer

$$\frac{3\pm\sqrt{345}}{24}$$

Answer

$$\frac{-3\pm\sqrt{345}}{24}$$

Answer

$$\frac{3\pm\sqrt{345}}{-24}$$

Answer

$$\frac{3\pm i\sqrt{39}}{24}$$

Question 7

Solve by the Quadratic Formula:

$$18j^{2\ }+9j\ +16=12+7j^2$$

Accepted Answer

$$\frac{-9\pm i\sqrt{95}}{22}$$

Answer

$$\frac{-9\pm\sqrt{95}}{22}$$

Answer

$$\frac{9\pm i\sqrt{95}}{22}$$

Answer

$$\frac{9\pm\sqrt{95}}{22}$$

Question 8

What is the discriminant of the quadratic formula?

Accepted Answer

b2-4ac

Answer

b2-4a

Answer

b-4ac

Answer

b2-ac

Question 9

Factor: 49x² - 100

Accepted Answer

(7x - 10)(7x + 10)

Answer

(49x + 100)(x - 1)

Answer

(49x - 10)(x + 10)

Answer

(7x -10)(7x - 10)

Question 10

Factor: 3x²- 6x - 24

Accepted Answer

3(x + 2)(x - 4)

Answer

(3x - 8)(x + 3)

Answer

(3x + 4)(x - 6)

Answer

3(x - 2)(x + 4)

Question 11

7x² - 26x - 8 = 0

Accepted Answer

x = 4 and x = -2/7

Answer

x = -1 and x = -7/8

Answer

x = -4 and x = 2/7

Answer

x = 4 and x = -7/2

Question 12

Identify the 'a' value:
y = 16x² - 8x - 24

Accepted Answer

16

Answer

8

Answer

-8

Answer

-24

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