№1 Упростите:
а) (2х-5) (3х+4)
б) (х-3у) (2у-5х)
в) а(а-5)-(а-2)(а-3)
г) (2в+1) (4в²-2в+1)

№2 Разложите на множители:
а) х³+2х²+х+2
б) 4х-4у+ху-у²

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