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Which algebraic expression is represented by a visual area model that divides a large square into one x² square, two xy rectangles, and one y² square?

Answer and explanation

Correct answer: (x+y)²

The correct answer is A: (x+y)². The large square has side x+y, so its total area is (x+y)². The four regions have areas x², xy, xy, and y². Adding them gives x²+xy+xy+y²=x²+2xy+y², which is exactly the expansion of (x+y)². Option A is correct because it represents the whole large square. Option B is wrong because (x−y)²=x²−2xy+y² has a negative middle term, whereas the two xy rectangles here are added. Option C is wrong because x²+y² omits both xy rectangles. Option D is wrong because x²−y² represents a difference of squares and includes subtraction, not the four positive regions in the diagram. The model shows that the middle term comes from two equal rectangles, each with area xy. Memory cue: two positive xy pieces always combine to +2xy.

Related tags

Algebraic IdentitiesVisual ModelsArea ModelPerfect Square TrinomialVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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