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If x>y, which product represents the remaining area after a square of side y is removed from a square of side x?

Answer and explanation

Correct answer: (x+y)(x−y)

The correct answer is A: (x+y)(x−y). The original square has area x² and the removed square has area y², so the remaining area is x²−y². The difference-of-squares identity factors this as x²−y²=(x+y)(x−y). A visual model shows the same result by rearranging the leftover parts into a rectangle whose sides are x+y and x−y. Option B is the square of a sum and is larger than the required expression. Option C is the area of a square with side x−y, not generally the leftover region. Option D adds the two areas instead of subtracting the removed one. The phrase “removed square” is a strong clue for a difference of squares.

Related tags

Difference-Of-SquaresArea-ModelAlgebraic-IdentityVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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