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If (u=1) and (v=-3), what is the value of (u-2v)?

Answer and explanation

Correct answer: 7

Substituting the given values, \(u-2v=1-2(-3)\). Since \(2(-3)=-6\), we get \(1-(-6)=1+6=7\). Therefore, the correct answer is 7. Option 5 may result from handling the subtraction of a negative number incorrectly. Exam tip: subtracting a negative quantity changes into addition.

Related tags

Algebraic ExpressionsSubstitution Of ValuesSigned NumbersPolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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