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When simplifying ( (x+1)(x+2)(x+3) ) starting with the first two factors, which middle step is correct?

Answer and explanation

Correct answer: \((x^2+3x+2)(x+3)\)

Multiply the first two factors: \((x+1)(x+2)=x^2+2x+x+2=x^2+3x+2\). Hence the correct intermediate step is \((x^2+3x+2)(x+3)\). In option B, the linear terms have been combined incorrectly. Exam tip: when multiplying two binomials, multiply every term in one bracket by every term in the other bracket.

Related tags

Algebraic IdentitiesPolynomial MultiplicationBinomial ProductStepwise SimplificationClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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