Find c Quiz
10 questions · easy to harder · Algebra 1 · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 5 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
x2 + 6x + c = 0 has exactly one solution. Find c.- A) c = 9
- B) c = 36
- C) c = 0
- D) c = 3
2 Question 2
x2 − 10x + c = 0 has exactly one solution. Find c.Type the answer.
3 Question 3
x2 − 8x + c = 0 has exactly one real solution. Find c.- A) c = 1
- B) c = 64
- C) c = 0
- D) c = 16
4 Question 4
x2 + kx + 9 = 0 has exactly one solution. Find k.Type the answer.
5 Question 5
2x2 − 8x + c = 0 has exactly one solution. Find c.- A) c = −8
- B) c = 8
- C) c = 0
- D) c = 64
6 Question 6
x2 + 5x + c = 0 has exactly one solution. Find c.Type the answer.
7 Question 7
x2 − 6x + c = 0 has two real solutions. Find c.- A) c < 36
- B) c < 9
- C) c < −36
- D) c < 0
8 Question 8
x2 + kx + 16 = 0 has exactly one solution. Find k.Type the answer.
9 Question 9
−x2 + 6x + c = 0 has exactly one solution. Find c.- A) c = 0
- B) c = −9
- C) c = 36
- D) c = −36
10 Question 10
x2 + 10x + c = 0 has no real solutions. Find c.Type the answer.