To simplify the expression \((2u - 7y) - (7u + 2y)\), we follow these steps:
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Distribute the negative sign across the second set of parentheses: \[ (2u - 7y) - (7u + 2y) = 2u - 7y - 7u - 2y \]
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Combine like terms:
- For the \(u\) terms: \(2u - 7u = -5u\)
- For the \(y\) terms: \(-7y - 2y = -9y\)
Thus, combining everything gives: \[ -5u - 9y \]
The correct answer is: −5u−9y (negative 5 u minus 9 y).