设z=|1-2✔2i|-(2+3i),则|z|?

问题描述:

设z=|1-2✔2i|-(2+3i),则|z|?

|1-2√2i| = √[1^2+(2√2)^2] = √(1+8) = √9 = 3
z = 3 - 2 -3i = 1 - 3i
|z| = √(1^2+3^2) = √10