Ответ:
1)x²-y²+x-y=(x-y)(x+y+1)
2)4x²-4xy+y²-9=(2x-y-3)(2x-y+3)
3)ab⁴-b⁴-ab²+b²=b²(a-1)*(b-1)*(b+1)
4)4-a²+2ab-b²=(2-a+b)(2+a-b)
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Ответ:
1)x²-y²+x-y=(x-y)(x+y+1)
2)4x²-4xy+y²-9=(2x-y-3)(2x-y+3)
3)ab⁴-b⁴-ab²+b²=b²(a-1)*(b-1)*(b+1)
4)4-a²+2ab-b²=(2-a+b)(2+a-b)