Advanced MathEasy–MediumValue of a quadratic rule at 3
Advanced Math practice question
The function d is defined by d(x) = 3x² + 2x. What is the value of d(3)?
Answer: 33
3(9) + 6 = 33.
Common wrong answers
- If you answered 15
- 15 uses 3(3) + 6.
- If you answered 27
- 27 forgets the 2x.
- If you answered 87
- 87 uses (3 × 3)² + 6.
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 ?
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