9у² + 17у - 2 =
= 9у² + (18у - у) - 2 =
= (9у² + 18у) - (у + 2) =
= 9у · (у + 2) - 1 · (у + 2) =
= (у + 2)·(9у - 1)
Ответ: (у + 2)(9у - 1)
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9у² + 17у - 2 =
= 9у² + (18у - у) - 2 =
= (9у² + 18у) - (у + 2) =
= 9у · (у + 2) - 1 · (у + 2) =
= (у + 2)·(9у - 1)
Ответ: (у + 2)(9у - 1)