1.Разложите многочлен на множители: а) -12а^2+18a^3 b) 2a+4b-ab-2b^2 v) x^2-64y^2 g) -2x^3-28x^2-98x. Решите ,пожалуйста.

2.сократите дробь

a)

49m^2-n^2

_______(деление)

3mn^2-21m^n

b)

81x^2-16

_______(деление)

16+72x+81x^2

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