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What is the degree of (x^3(2x^2-5)+4x^2)?

Answer and explanation

Correct answer: 5

Expanding the expression gives \(x^3(2x^2-5)+4x^2=2x^5-5x^3+4x^2\). The highest power of \(x\) is 5, and its coefficient, 2, is non-zero. Therefore, the degree of the polynomial is 5. The outside factor \(x^3\) multiplies \(2x^2\), so their exponents add to give \(x^5\); hence 3 is not the degree. Exam tip: expand brackets and simplify terms before identifying the highest exponent.

Related tags

PolynomialsDegree Of PolynomialExpanding PolynomialsAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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