Ola Paulo

vamos por partes

(1+i)^9 * (2- y)^3/ ( -1 – i)^10

(1 + i)^2 = 2i

(1 + i)^8 = (2i^4 = 16

(1 + i)^9 = 16*(1 + i) = 16 + 16i

(-1 - i)^10 = (1 + i)^10 = (1 + i)^9*(1 + i) = (16 + 16i) *( 1 + i) = 16 + 16i + 16i - 16 = 32i

(1 + i)^9/(1 + i)^10 = (16 + 16i)(32i) = (16i - 16)/-32 = 1/2 - i/2

(1/2 - i/2)*(2 - y)^3 = (2 - y)^3/2 - (2 - y)^3i/2

a = (2 - y)^3/2

b = -(2 - y)^3/2

pronto