помогите разложить многочлен на множители 1)-21b³-14b² 2)mn+3m-n²-3n 3)81a²-b² 4)3y³-36y²+108y
1. -21b³-14b² = -7b²(3b+2)
2. mn+3m-n²-3n = n(m-n)+3(m-n) = (m-n)(n+3)
3. 81a²-b² = (9a-b)(9a+b)
4. 3y³-36y²+108y = 3y(y²-12y+36)
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Answers & Comments
1. -21b³-14b² = -7b²(3b+2)
2. mn+3m-n²-3n = n(m-n)+3(m-n) = (m-n)(n+3)
3. 81a²-b² = (9a-b)(9a+b)
4. 3y³-36y²+108y = 3y(y²-12y+36)