Ответ:
25-9x-6xy-y²=25-(9x²+6xy+y²)=
25-(3x+y)²=(5-3x-y).(5+3x+y)
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Ответ:
25-9x-6xy-y²=25-(9x²+6xy+y²)=
25-(3x+y)²=(5-3x-y).(5+3x+y)