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What is obtained by subtracting (3a+4b) from (5a-2b)?

Answer and explanation

Correct answer: \(2a-6b\)

Subtraction means adding the opposite of every term in the second expression: \((5a-2b)-(3a+4b)=5a-2b-3a-4b\). Combining like terms gives \(5a-3a=2a\) and \(-2b-4b=-6b\). Therefore, the result is \(2a-6b\). In \(2a+2b\), the sign of \(4b\) has been handled incorrectly. Exam tip: when a minus sign precedes parentheses, change the signs of all terms inside them.

Related tags

Algebraic ExpressionsPolynomial SubtractionLike TermsSign RulesClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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