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For which value will the degree of ((k+5)x^4-7x+9) be (1)?

Answer and explanation

Correct answer: \(k=-5\)

The degree of a polynomial is the greatest exponent of the variable having a non-zero coefficient. For the degree to be 1, the coefficient of \(x^4\) must be zero: \(k+5=0\). Hence, \(k=-5\). The polynomial then becomes \(-7x+9\), which has degree 1 because the coefficient of \(x\), \(-7\), is non-zero. Exam tip: In parameter-based polynomials, first set the coefficient of the highest power equal to zero and then check the remaining terms.

Related tags

PolynomialsDegree Of PolynomialParameterAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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