1)б
2)б
3)4x²+12x=4x(x+3)
4)36a²-b²=(6a-b)(6a+b)
8)a²-9b²+a+3b=(a-3b)(a+3b)+a+3b
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1)б
2)б
3)4x²+12x=4x(x+3)
4)36a²-b²=(6a-b)(6a+b)
8)a²-9b²+a+3b=(a-3b)(a+3b)+a+3b