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What is the difference between (y² - 4y + 9) - (3y² - 6y - 9) ?
(y² - 4y + 9) - (3y² - 6y - 9)
= y² - 4y + 9 - 3y² + 6y + 9 {removed parentheses, distributing negative sign through second set of parentheses} = -2y² + 2y + 18 {combined like terms} Ask the House
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