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Which visual comparison explains the meaning of ((x+5)^2-(x^2+25))?

Answer and explanation

Correct answer: Only the area of two 5x rectangles remains from the complete square

The correct answer is A. A square with side x+5 has total area (x+5)^2. In the visual arrangement, this large square consists of an x^2 square, two rectangles of area 5x each, and a 5 by 5 square of area 25. Subtracting x^2+25 removes the two square regions and leaves only the two rectangular strips. Their combined area is 5x+5x=10x, which agrees with (x+5)^2-(x^2+25)=x^2+10x+25-x^2-25=10x. B is wrong because x^2 is specifically removed. C is wrong because 25 is also removed. D is wrong because the two 5x strips remain. Memory cue: subtract the named pieces from the complete picture, not the whole picture.

Related tags

Area-ComparisonRemaining-RectanglesVisual-IdentitySubtractionVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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