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If 52² is solved using the area model of (50 + 2)², what is the large part 50²?

Answer and explanation

Correct answer: 2500

The correct answer is B. In the area model for (50 + 2)², the large square has side 50, so its area is 50². Calculate 50 × 50 = 2500. The other parts are two rectangles of area 50 × 2 = 100 each and a small square of area 2² = 4; together they eventually give 2704 for 52². However, the question asks only for the large 50² part, so the answer is 2500. Option A is the area of one 50-by-2 rectangle, not the large square. Option C is 50² + 100, and option D is the complete value of 52². Memory cue: identify the requested region before adding all regions.

Related tags

Area ModelNumerical SquareBinomial ExpansionMental CalculationVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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