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Which expression is obtained after simplifying (2x-3(4-x))?

Answer and explanation

Correct answer: \(5x-12\)

On opening the bracket, \(-3(4-x)=-12+3x\), because \(-3\) multiplies both 4 and \(-x\). Therefore, \(2x-3(4-x)=2x-12+3x=5x-12\). In \(5x+12\), the sign of the constant term is incorrect. Exam tip: when multiplying a bracket by a negative number, check the sign of every term.

Related tags

Algebraic ExpressionsDistributive PropertySimplifying ExpressionsLinear PolynomialsBracketsIntroduction To PolynomialsMathematicsClass 9 Mcq

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