решить примеры 1. 16m^8-25n^4
2. b^3-8c^3
3. 15a^6 b-3a^4 b^2
4. -6m^2 n^2+9m^2 n-12mn^2
5. 4x-4y+cx-cy
6. x^3 y^2-x^3-xy^2+x
7. 49x^2 y-y^3
8. -6m^3+12m^2 n-6mn2


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1) (4m^4)2-(5n^2)2

2) (b-2c)(b^2+2cb+4c^2)

3)3a^4b(5a-b)

4)-3mn(2mn-3m+4n)

5)4(x-y)+c(x-y)=(4+c)(x-y)

6)x^3(y^2-1)-x(y^2-1)=(x^3-x)(y-1)(y+1)=x(x-1)(x+1)(y-1)(y+1)

7) y(49x^2-y^2)=y(7x-y)(7x+y)

8) -6m(m^2-2mn+n^2)= -6m(m-n)^2