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If a model of a square with side \((g-1)\) is made, what will be the total area?

Answer and explanation

Correct answer: \(g^2-2g+1\)

Correct answer: C. The area of a square is side multiplied by itself, so the required area is (g−1)². Apply (a−b)²=a²−2ab+b² with a=g and b=1: (g−1)²=g²−2(g)(1)+1²=g²−2g+1. Therefore option C is correct. Option A, g²−1, is the difference of squares g²−1² and is not the same as the square of a difference; it misses the middle term. Option B belongs to (g+1)² and has a positive middle term. Option D has an incorrect coefficient and does not result from multiplying (g−1) by itself. Memory cue: when a binomial is squared, never omit the middle term.

Related tags

Square Of DifferenceArea ModelPolynomial ExpansionAlgebraic IdentitiesVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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