Advanced MathMediumSum of the values of a linked variable
Advanced Math practice question
If x² − 5x + 6 = 0 and y = x + 1, what is the sum of all possible values of y?
Answer: 7
x² − 5x + 6 = (x − 2)(x − 3), so x = 2 or 3, giving y = 3 or 4. The sum is 7.
Common wrong answers
- If you answered 5
- 5 is the sum of the x-values.
- If you answered 6
- 6 is the product of the x-values.
- If you answered 12
- 12 is the product of the y-values.
More Advanced Math questions
- Medium
What are the solutions to x² − 5x + 6 = 0? - Medium
The graph of f(x) = (x − 3)² + 4 is a parabola. What are the coordinates of its vertex? - Medium
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If √(x + 5) = 4, what is the value of x? - Medium
If f(x) = x + 3 and g(x) = 2x, what is f(g(4))? - Medium
What are the solutions to x² + 6x + 8 = 0?
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