Answer:
B. area = x^2 + 2xy + y^2
Step-by-step explanation:
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
To make things easier, convert the mixed number 12 1/2 into a fraction.
12 1/2 = 25/2
1/3 x 25/2 = 25/6
X= -0.5. Get Desmos, it's really helpful for this sort of thing.
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