If a person's age is represented by the equation x^2 - 7x + 10 = 0, what are the possible ages?
Category: Math · Difficulty: expert
Hint: Factor the quadratic equation.
Answer
2 and 5
Explanation
Factoring gives (x-2)(x-5)=0, hence x=2 or x=5.
This is a expert math riddle — one of the harder riddles here. The answer is 2 and 5.
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