ExamPrepWay
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
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 10
Multiple Choice Question
Question
If f(x) = 2x^2 - 3, what is f(4)?
Explanation
Correct Answer: B
ANSWER
Correct Answer: B
Method / Topic: Algebra
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Detailed Explanation
Question
If f(x) = 2x^2 - 3, what is f(4)?
ANSWER
Correct Answer: B
Method / Topic: Algebra
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Need the full method?
See full explanation + shortcut trick
Compare the quick idea with the premium step-by-step explanation and faster solving trick for this pattern.
Question 10
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
If f(x) = 2x^2 - 3, what is f(4)?
Explanation
Correct Answer: B
ANSWER
Correct Answer: B
Method / Topic: Algebra
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Detailed Explanation
Question
If f(x) = 2x^2 - 3, what is f(4)?
ANSWER
Correct Answer: B
Method / Topic: Algebra
Substitute x = 4: f(4) = 2(16) - 3 = 29.
Locked premium value
See full explanation + shortcut trick
Use the free answer check first, then unlock the complete breakdown, shortcut path, and richer explanations for similar questions.
Keep Practicing This Pattern
Topic Recommendations
Practice Similar Questions
Recommended Next Practice
Use these suggestions after solving the practice questions above.
Concept tagged
Translate the question into an equation
solve carefully
and check the result.