Advanced MathMediumConstant after completing the square
Advanced Math practice question
The expression x² − 10x + 34 can be written in the form (x − h)² + k, where h and k are constants. What is the value of k?
Answer: 9
(x − 5)² = x² − 10x + 25, so x² − 10x + 34 = (x − 5)² + 9.
Common wrong answers
- If you answered 5
- 5 is h, not k.
- If you answered 34
- 34 is the original constant.
- If you answered -9
- −9 has the sign wrong.
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