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The quadratic with roots 1 + sqrt(2) and 1 - sqrt(2) is
Ax^2 + 2x - 1 = 0
Bx^2 - 2x + 1 = 0
Cx^2 - 2x - 1 = 0
Dx^2 - 2x + 3 = 0
Answer & Solution
Correct answer: C. x^2 - 2x - 1 = 0
The roots sum to 2 and multiply to 1 - 2 = -1, giving x^2 - 2x - 1.
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