Объяснение:
1) (8a^2b^4c^3)^2 = 64a^4b^16c^9
2)(9x+y)^2 = 81x^2 + 18xy + y^2
3) ((-1,2х^5y^7z^3)^2)^2 = (1,44x^10y^14z^9)^2 = 2,0736x^100y^196z^81
4) (-1,2abc)^2 = 1,44a^2b^2c^2
Объяснение:
1) (8a^2b^4c^3)^2 = 64a^4b^16c^9
2)(9x+y)^2 = 81x^2 + 18xy + y^2
3) ((-1,2х^5y^7z^3)^2)^2 = (1,44x^10y^14z^9)^2 = 2,0736x^100y^196z^81
4) (-1,2abc)^2 = 1,44a^2b^2c^2