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Answer:
B
Explanation:
area of a square = s² ( s is the side length )
here s = x + y, hence
area = (x + y)² ← expand using FOIL )
= x² + xy + xy + y² = x² + 2xy + y² → B
B. area = x^2 + 2xy + y^2
Area of square with side s is s^2.
This square has side x + y, so
area = (x + y)^2
area = (x + y)(x + y)
area = x^2 + xy + xy + y^2
area = x^2 + 2xy + y^2
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