Solving Quadratics

Solving Quadratics

8th Grade

13 Qs

quiz-placeholder

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Solving Quadratics

Solving Quadratics

Assessment

Quiz

Mathematics

8th Grade

Hard

Created by

Amber Bates

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Solve by factoring: x2 - 9x + 20 = 0

x = -4 and x = -5
x = 20 and x = -9
x = 4 and x = 5
x = -4 and x = 5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Factor: 49x2 - 100

(49x + 100)(x - 1)
(7x - 10)(7x + 10)
(49x - 10)(x + 10)
(7x -10)(7x - 10)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Factor:   3x2- 6x - 24

(3x - 8)(x + 3)
(3x + 4)(x - 6)
3(x - 2)(x + 4)
3(x + 2)(x - 4)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7x2 - 26x - 8 = 0

x = -1 and x = -7/8
x = 4 and x = -2/7
x = -4 and x = 2/7
x = 4 and x = -7/2

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(x + 1) 2 = 25

± 5
4  or  -6
-4  or  6
± 4

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve 14 - x² = 17

x = ±1.73
x = 3
no solution
x = -3

7.

MULTIPLE CHOICE QUESTION

5 mins • 12 pts

Suzie solves the equation below:
x2 + 4x - 12 = 2
(x - 2)(x + 6) = 2, 
by setting x -2 = 0 and x + 6 = 0. 
Her solutions are x = 2 and x = -6.
Is Suzie correct? Why or why not?

Yes, she factored correctly and then used the zero product property
Yes, she factored correctly and then square rooted.
No, she did factor correctly, but she can't use the zero product property as shown.
No, she didn't factor correctly so the rest of her work is wrong. 

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