Question

VALENDO 50 PONTOS!!!
me ajudem por favor!!!!

1.Sendo Z=3+2i e W=-5+4i efetuar Z+W

2. Calcular: (2-5i)+(-1+7i)+(3+2!)=

3. Dados: Z= 7i, W= 2-3i e K= 5, calcular Z+W+K

4. Sendo Z= 9-i e W= -3+8i, calcular Z-W

5. Calcular: (3+2i)+(-5-7i)-(4-2i)

6. Calcular: (-3+8i)-(9-i) =

7. Dados Z= 3+4i e W= 2+5i, efetuar Z.W

8. Dados Z= 7i e E 2-3i, calcular Z.W​

Answer 1

Resposta:

1.z=3+2i e w=-5+4i

z+w=(3+2i)+(-5+4i)

=3+2i-5+4i

=3-5+2i+4i

=-2+6i

2.(2-5i)+(-1+7i)+(3+2!)

2-5i-1+7i+(3+2×1)

2-5i-1+7i+(3+2)

2-5i-1+7i+5

2-1+5-5i+7i

6+2i

3.z+w+k

7i+2-3i+5

2+5-3i+7i

7+4i

4.z-w

(9-i)-(-3+8i)

9-i+3-8i

9+3-i-8i

12-9i

5.(3+2i)+(-5-7i)-(4-2i)

3+2i-5-7i-4+2i

3-5-4+2i-7i+2i

-6-3i

6.(-3+8i)-(9-i)=

=-3+8i-9+i

=-3-9+8i+i

=-12+9i

7.z.w

(3+4i)×(2+5i)

=3×2+3×5i+4i×2+4i×5i

=6+15i+8i+20i²

=6+15i+8i+20×(-1)

=6+15i+8i-20

=6-20+15i+8i

=-14+23i

8.7i×(2-3i)

14i-21i²

14i-21×(-1)

14i+21

21+14i

Explicação passo-a-passo:

i²=-1