Advanced MathEasy–MediumValue of a quadratic rule at 3
Advanced Math practice question
A rule assigns to each number x the value 2x² − 5. What value does the rule assign to 3?
Answer: 13
2(9) − 5 = 13.
Common wrong answers
- If you answered 1
- 1 uses 2(3) − 5.
- If you answered 23
- 23 adds 5 instead of subtracting.
- If you answered 31
- 31 uses (2 × 3)² − 5.
More Advanced Math questions
- Easy–Medium
If f(x) = 2x² − 3, what is f(4)? - Easy–Medium
Which expression is equivalent to (2x³)(3x⁴)? - Easy–Medium
What are the solutions to x² − 16 = 0? - Easy–Medium
Which expression is equivalent to (x + 5)²? - Easy–Medium
For x ≠ 0, which expression is equivalent to (x² + 3x) / x? - Easy–Medium
What are the solutions to the equation 2(x − 3)² − 32 = 0 ?
Not affiliated with the College Board. SAT is a trademark of the College Board.