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Which figure directly represents the area (u − v)²?

Answer and explanation

Correct answer: A square with side (u − v)

The correct answer is A: a square with side (u − v). Start with the basic area formula for a square: area = side × side = (side)². If the side length is u − v, then its area is (u − v)(u − v) = (u − v)². This is exactly the visual meaning of the expression. Option B describes a square whose area is (u + v)², because both of its sides are u + v; it represents a different identity. Option C describes a rectangle with area (u + v)(u − v), which simplifies to u² − v², not (u − v)². Option D describes a square with area v², because its side is v. Thus only A has the required side length and gives the required squared expression. A useful memory cue is: for a square, the expression being squared is the length of each side. Do not confuse the square of a difference, (u − v)², with the difference of squares, u² − v².

Related tags

Square AreaDifference Of BinomialVisual AlgebraAlgebraic IdentitiesClass 9 MathematicsVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematics

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