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Which method is correct to explain a² − b² visually?

Answer and explanation

Correct answer: Removing the smaller b-square from the larger a-square

The correct answer is A: remove the square of side b from the square of side a. A square with side a has area a², and a square with side b has area b². When the smaller b-square is removed from the larger a-square, the remaining area is a² − b². This is exactly what a visual area model should show. Option B gives 2a², not a² − b². Option C gives 4b², so it does not represent the required subtraction. Option D shows only a length, whereas the expression represents an area. Do not confuse the difference of squares, a² − b², with the square of a difference, (a − b)². Memory cue: “large square minus small square.”

Related tags

Visual ModelDifference Of SquaresArea IdentityAlgebraic IdentitiesVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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