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If (x=2) and (y=3), what is the value of ((x+y)^2-xy)?

Answer and explanation

Correct answer: 19

Substituting the given values, \,\((x+y)^2-xy=(2+3)^2-(2\times3)=5^2-6=25-6=19\). Therefore, the correct answer is 19. The value 25 is only \,\((x+y)^2\); \,\(xy=6\) must also be subtracted. Exam tip: Evaluate the squared term first, then perform multiplication and subtraction in order.

Related tags

Algebraic ExpressionsSubstitutionEvaluating ExpressionsOrder Of OperationsPolynomialsIntroduction To PolynomialsMathematicsClass 9 Mcq

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