2xy + 4x² + 5xy + 5y² + 16x² is equal to:

4xy + 9x² +16y²

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3xy + 10x² + 5y²

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16x² + 5y² + 7xy

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20x² + 5y² + 7xy

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Solution

The correct option is D
20x² + 5y² + 7xy

Add the like terms.

2xy, 5xy are like terms.

Similarly, 4x² and 16x² are like terms.

2xy + 5xy = 7xy and 4x² + 16x² = 20x²

2xy + 4x² + 5xy + 5y² + 16x² = 20x² + 5y² + 7xy

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