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Solve this faster with the right shortcut first
Shortcut used: Translate the question into an equation, solve carefully, and check the result.
Solve in 3 steps:
- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
Common mistake: Do not change signs while moving terms across the equation.
Question 6
Multiple Choice Question
Question
What are the solutions of x^2 - 9 = 0?
Explanation
Correct Answer: B
ANSWER
Correct Answer: B
Method / Topic: Algebra
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
Detailed Explanation
Question
What are the solutions of x^2 - 9 = 0?
ANSWER
Correct Answer: B
Method / Topic: Algebra
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
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Question 6
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Translate the question into an equation, solve carefully, and check the result.
Solve in 3 steps:
- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
Common mistake: Do not change signs while moving terms across the equation.
Question
What are the solutions of x^2 - 9 = 0?
Explanation
Correct Answer: B
ANSWER
Correct Answer: B
Method / Topic: Algebra
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
Detailed Explanation
Question
What are the solutions of x^2 - 9 = 0?
ANSWER
Correct Answer: B
Method / Topic: Algebra
Factor as (x - 3)(x + 3) = 0, giving x = 3 or x = -3.
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Concept tagged
Translate the question into an equation
solve carefully
and check the result.