Multiply.(x + 8)(x3 + 2x - 7)
A. x4 + 8x3 + 2x2 + 23x - 56
B. x3 + 10x2 + 9x - 56
C. x4 + 8x3 + 2x2 + 9x - 56
D. x4 + 2x2 - 7x + 8
Answer: C
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Find the product of the complex number and its conjugate.6 + 
i
A. 42 B. 30 C. 72 D. 36 + 6i
Assume that the two points P(-2, 4) and Q(-3, -1) are given. What is the distance between P and Q?
What will be an ideal response?
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 30(cos 34° + i sin 34°), z2 = 5(cos 5° + i sin 5°)
A. 6(cos 39° + i sin 39°)
B. 25
C. 6(cos 29° + i sin 29°)
D. 25(cos 29° - i sin 29°)
Solve the equation in the complex number system.x5 - 1 = 0
A. 1, cos(36°) + i sin(36°), cos(108°) + i sin(108°), cos(180°)+ i sin(180°), cos(252°) + i sin(252°) B. -1, cos(72°)+ i sin(72°), cos(144°) + i sin(144°), cos(216°) + i sin(216°), cos(288°) + i sin(288°) C. 1, cos(72°) + i sin(72°), cos(144°) + i sin(144°), cos(216°) + i sin(216°),-1 D. 1, cos(72°)+ i sin(72°), cos(144°) + i sin(144°), cos(216°) + i sin(216°), cos(288°) + i sin(288°)