Solve the quadratic equation: x² + 6x + 5 = 0
Solving Quadratic Equations

Quiz
•
Life Skills
•
8th Grade
•
Medium
RiChiella Johnson
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
x = -1 or x = -5
x = 1 or x = 5
x = -2 or x = -3
x = 2 or x = 3
Answer explanation
To solve x² + 6x + 5 = 0, factor it as (x + 1)(x + 5) = 0. Setting each factor to zero gives x = -1 and x = -5. Thus, the correct answer is x = -1 or x = -5.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: x² + 8x - 9 = 0
x = 1, x = -9
x = -1, x = 9
x = 3, x = -3
x = -3, x = 3
Answer explanation
To solve x² + 8x - 9 = 0, use the quadratic formula x = (-b ± √(b²-4ac))/2a. Here, a=1, b=8, c=-9. This gives x = 1 and x = -9, making the correct choice x = 1, x = -9.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: x² - 6x + 9 = 0
x = 3
x = -3
x = 0
x = 6
Answer explanation
To solve x² - 6x + 9 = 0, factor it as (x - 3)² = 0. Setting (x - 3) = 0 gives x = 3. Thus, the correct answer is x = 3.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: x² + 4x - 7 = 0
x = 1, x = -7
x = -2 ± √11
x = 3, x = -3
x = 2 ± √5
Answer explanation
To solve x² + 4x - 7 = 0, use the quadratic formula x = (-b ± √(b²-4ac))/2a. Here, a=1, b=4, c=-7. This gives x = -4/2 ± √(16+28)/2 = -2 ± √11. Thus, the correct answer is x = -2 ± √11.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: x² - 5x - 24 = 0
x = 8 or x = -3
x = 6 or x = -4
x = 5 or x = -5
x = 7 or x = -2
Answer explanation
To solve x² - 5x - 24 = 0, we can factor it as (x - 8)(x + 3) = 0. Setting each factor to zero gives x = 8 or x = -3, confirming the correct choice.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: x² - 8x + 15 = 0
x = 3 or x = 5
x = 2 or x = 7
x = 1 or x = 8
x = 4 or x = 6
Answer explanation
To solve x² - 8x + 15 = 0, factor it as (x - 3)(x - 5) = 0. Setting each factor to zero gives x = 3 or x = 5, which matches the correct answer choice.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve the quadratic equation: 4x² - 4x + 17 = 0
x = 1 + 2i, x = 1 - 2i
x = 2 + 3i, x = 2 - 3i
x = 3 + 4i, x = 3 - 4i
x = 4 + 5i, x = 4 - 5i
Answer explanation
To solve 4x² - 4x + 17 = 0, we use the quadratic formula x = (-b ± √(b² - 4ac)) / 2a. Here, a=4, b=-4, c=17. The discriminant (b² - 4ac) is negative, yielding complex roots: x = 1 ± 2i.
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