Quiz 5

Simplify:

(5-2i) + (-7+8i)

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

Simplify:

(10+ 15i) - (48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

Simplify:

8i(2 + 3i) + 6i(2 + i)

• -30 - 4i

• 30 - 28i

• -30 + 28i

• 16 + 48i

(8 + 2i) + (1 - 6i) - (-8 - 8i)

• 17 + 4i

• 23 - 4i

• 1 + 16i

• 1 + 4i

Refer to the above image, what is the conjugate of the denominator?

• -1 + 5i

• 1 - 5i

• 1 + 5i

• -1 - 5i

Simplify

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 $\ \frac{2+5i}{3+i}\$  Simplify

•  $2+5i$  

•  $\frac{11}{10}+\frac{13}{10}i$  

•  $\frac{3}{10}+\frac{13}{10}i$  

•  $\frac{11}{8}+\frac{13}{8}i$  

What is the conjugate of 2 - 7i ?

• 7 + 2i

• 2 + 7i

• -2 - 7i

• -2 + 7i

(3i)(-2 + 4i)

• -6 + 12i

• -12 - 6i

• -2 + 7i

• 12 + 6i

What is the conjugate of -2i + 7

• -2i - 7
• 2i - 7
• -7 + 2i
• 7 + 2i