Ответ:
1) 8b² + 12bc - 6bc + 9c² - 8b² / (2b - 3c)(2b + 3c) = 6bc + 9c² / (2b - 3c)(2b + 3c) = 3c(2b + 3c) / (2b - 3c)(2b + 3c) = 3c/2b - 3c
2) 4y² - 6y - 6y + 9 / (2y - 3)(4y² + 6y + 9) = 4y² - 12y + 9 / (2y - 3)(4y² + 6y +9) (2y - 3)² / (2y - 3)(4y² + 6y + 9) = 2y - 3 / 4y² + 6y + 9
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Ответ:
1) 8b² + 12bc - 6bc + 9c² - 8b² / (2b - 3c)(2b + 3c) = 6bc + 9c² / (2b - 3c)(2b + 3c) = 3c(2b + 3c) / (2b - 3c)(2b + 3c) = 3c/2b - 3c
2) 4y² - 6y - 6y + 9 / (2y - 3)(4y² + 6y + 9) = 4y² - 12y + 9 / (2y - 3)(4y² + 6y +9) (2y - 3)² / (2y - 3)(4y² + 6y + 9) = 2y - 3 / 4y² + 6y + 9