1) (x+2y)^2 = x^2 + 2xy + 2xy + 4y^2 = x^2 + 4xy + 4y^22) (a-2)^3 = a^3 - 3a^22 + 3a(2^2) - 2^3 = a^3 - 6a^2 + 12a - 83) (c-0,1d)^2 = c^2 - 2(c0,1d) + (0,1d)^2 = c^2 - 0,2cd + 0,01d^24) (a+2y)^3 = a^3 + 3a^22y + 3a(2y)^2 + (2y)^3 = a^3 + 6a^2y + 12ay^2 + 8y^3
1) (x+2y)^2 = x^2 + 2xy + 2xy + 4y^2 = x^2 + 4xy + 4y^2
2) (a-2)^3 = a^3 - 3a^22 + 3a(2^2) - 2^3 = a^3 - 6a^2 + 12a - 8
3) (c-0,1d)^2 = c^2 - 2(c0,1d) + (0,1d)^2 = c^2 - 0,2cd + 0,01d^2
4) (a+2y)^3 = a^3 + 3a^22y + 3a(2y)^2 + (2y)^3 = a^3 + 6a^2y + 12ay^2 + 8y^3