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If p(x) = kx² + 3x + 4 has degree 1, what should be the value of k?

Answer and explanation

Correct answer: 0

The governing concept is the degree of a polynomial: it is the greatest exponent of the variable whose coefficient is non-zero. In p(x) = kx² + 3x + 4, the term kx² normally gives degree 2. To make the polynomial have degree 1, the coefficient of x² must vanish, so k = 0. The expression then becomes p(x) = 3x + 4, whose highest power of x is 1. Therefore option A is correct. Choosing k = 1 would leave an x² term and give degree 2; k = 3 or k = 4 would also leave a non-zero quadratic term. The non-zero coefficient 3 of x ensures that the resulting polynomial is genuinely linear.

Related tags

PolynomialsDegree Of PolynomialLinear PolynomialDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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