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If \(a\neq0\) and \(b=0\), what will be the degree of \(ax^8+bx^6-5x+2\)?

Answer and explanation

Correct answer: 8

When \(b=0\), the term \(bx^6\) becomes zero, so the polynomial is \(ax^8-5x+2\). Since \(a\neq0\), the coefficient of \(x^8\) is non-zero. The degree of a polynomial is the greatest exponent of the variable with a non-zero coefficient; therefore, the degree is 8. Option 6 is incorrect because the \(x^6\) term vanishes. Exam tip: First remove all terms whose coefficients are zero.

Related tags

PolynomialsDegree Of PolynomialZero CoefficientsAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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