Solve x² = 49 and x³ = 27 Quiz
10 questions · easy to harder · Foundations · 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.
- 2 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. No calculator: work it out on paper.
- 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.
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1 Question 1
Solve x2 = 49- A) x = −7 or x = −7
- B) x = 7 or x = −7
- C) x = 7
- D) x = −7
2 Question 2
Solve x3 = 27Type the answer.
3 Question 3
Solve x3 = 125Type the answer.
4 Question 4
Solve x3 = −64Type the answer.
5 Question 5
Solve 2x3 = 54Type the answer.
6 Question 6
Solve 3x3 = −24Type the answer.
7 Question 7
Solve x3 = 827Type the answer.
8 Question 8
Solve x3 = 20Type the answer.
9 Question 9
Solve x3 + 30 = 3- A) x = 3
- B) x = −3
- C) x = −27
10 Question 10
Solve x3 = −27125Type the answer.