1.Выполните умножение
а) (d+5)(d-6)
б)(7d-4)(4d+3)
в)(4e-4c)(5e-c)
г)(d-3)(d²-5d+5)
2.Разложите на множители
а)е(е+2)-5(е+2)
б)cb-ce+5b-5e
3.Упростите выражение
-0.3f(8f²+3)(15-6f)
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