1) 4а-8= 4(а-2)
2) 3m³-9m= 3m(m²-3)
3) 12a²b+16ab³= 4ab(3a+4b²)
4) 4x²-25= (2x-5)(2x+5)
5) 9m⁴-36p⁸= 9(m⁴-4p⁸) = 9(m²-2p⁴)(m²+2p⁴)
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Answers & Comments
1) 4а-8= 4(а-2)
2) 3m³-9m= 3m(m²-3)
3) 12a²b+16ab³= 4ab(3a+4b²)
4) 4x²-25= (2x-5)(2x+5)
5) 9m⁴-36p⁸= 9(m⁴-4p⁸) = 9(m²-2p⁴)(m²+2p⁴)