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For p(x)=x^2-2x+2, what is the correct conclusion about its real zeroes?

Answer and explanation

Correct answer: No real zeroes

The governing concept is determining the real roots of a quadratic by completing the square or using the discriminant. Completing the square gives x^2-2x+2=(x-1)^2+1. Since (x-1)^2 is never negative for real x, the whole expression is always at least 1 and cannot equal zero. The discriminant confirms this: b^2-4ac=(-2)^2-4(1)(2)=4-8=-4, and a negative discriminant means that the quadratic has no real roots. Hence option A is correct. Option B would require a positive discriminant, option C would require a zero discriminant, and option D incorrectly assumes that the constant term 2 is a zero without testing p(2).

Related tags

Quadratic PolynomialDiscriminantReal RootsPolynomials In One VariablePolynomialsMathematicsClass 10 Mcq

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