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In a visual model, \(a^2+2ab+b^2\) can be read as which single area?

Answer and explanation

Correct answer: \((a+b)^2\)

Correct answer: C. The expression contains one a² square, two ab rectangles, and one b² square. These four regions fit together to form one complete square whose side is a+b. Therefore its total area is (a+b)², and the identity is (a+b)²=a²+2ab+b². Option A is the square-of-a-difference identity and would contain a negative middle term, a²−2ab+b². Option B is the difference of two squares and has only two terms, so it cannot match four positive regions. Option D gives only one ab rectangle, not the whole model. Memory cue: two positive ab parts mean a plus b is the outer side.

Related tags

Perfect Square IdentityWhole SquareArea ModelVisual ProofVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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