Advanced MathEasy–MediumInput where a quadratic reaches a value
Advanced Math practice question
The function p is defined by p(x) = x² − 4. For what positive value of x is p(x) = 5?
Answer: 3
x² = 9, so x = 3.
Common wrong answers
- If you answered 1
- 1 solves x² − 4 = −3.
- If you answered 9
- 9 is x².
- If you answered 4.5
- 4.5 halves 9.
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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