Question

Dados Z=2-3i ; A=5i ; B=4 e C=-3+i ; Calcule:

a) 2Z-A+B-C

b) 3Z.C

Answer 1

 
 

Dados Z=2-3i ; A=5i ; B=4 e C=-3+i ; Calcule:

a) 2Z-A+B-C

2(2-3i ) - 5i + 4 - (-3+i)
4-6i - 5i + 4 + 3-i
11 - 12i



b) 3Z.C

3(2-3i)(-3+i)=3( - 6+ 2i + 9i - 3i^2) ==> 3(- 3 + 11i) ==> - 9 + 33i