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2. The sum of (x2 + 2xy + y) and (2x² + 4xy + 5y?) is
A. 3x² + xy + by
B. 3x + 6xy - 6y
C. 3x² - 6xy + 6y
D. 3x² - 6xy - 6
3. Add: (3x² + 4xy + 4y?). (5x + 6xy + 6y?) and (6x² + 5xy + 8y?)
A. 14x² + 15xy - 18y?
B. 14x + 15xy + 18y
C. 14x² - 15xy - 18y
D. 14x² - 15xy -- 18y?
4. Find the perimeter of a rectangle that measures (2x - 5y2 + 2xy),
(-7xy - 4y + 3x®). (6y² + xy - 4x®), and (-8 + 3xy + 7y2 + 5x?).​