Advanced MathEasy–MediumSide of a square from an area relation
Advanced Math practice question
The area of a square, in square units, is 10 more than three times its side length. What is the side length of the square?
Answer: 5
s² = 3s + 10 gives s² − 3s − 10 = 0, so (s − 5)(s + 2) = 0 and s = 5.
Common wrong answers
- If you answered 10
- 10 uses the constant as the answer.
- If you answered 25
- 25 is the area, not the side.
- If you answered -2
- −2 is the rejected negative root.
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