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What is the simplified form of (2x(5x-3)-3x(2x+1))?

Answer and explanation

Correct answer: \(4x^2-9x\)

Using the distributive property, \(2x(5x-3)=10x^2-6x\) and \(3x(2x+1)=6x^2+3x\). Hence, \((10x^2-6x)-(6x^2+3x)=4x^2-9x\). The option \(16x^2-9x\) results from incorrectly adding \(10x^2\) and \(6x^2\) instead of subtracting them. Exam tip: When a minus sign precedes a bracket, change the signs of every term inside that bracket.

Related tags

PolynomialsAlgebraic ExpressionsDistributive PropertyExpansionLike TermsIntroduction To PolynomialsMathematicsClass 9 Mcq

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