I is a complex number. Do you think I am defined? =- 1, and the total square formula of white is du (a+b)? =a？ +2ab+b？ .

So: (1-i)= 1? -2i+i？ = 1-2i- 1=-2i

(-me)? = Me? =- 1

Extended data

Complex number algorithm includes addition, subtraction, multiplication and division. The sum of two complex numbers is still a complex number, its real part is the sum of the original two complex numbers, and its imaginary part is the sum of the original two imaginary parts. The addition of complex numbers satisfies the commutative law and associative law.

In addition, when complex numbers are used as the base, exponent and real number of power sum logarithm, their operation rules can be derived from Euler formula E I θ = COS θ+I sin θ (arc system).