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Yanka [14]
3 years ago
8

Which of the following is a polynomial with degree 3 and zeros –3 and 1 + i?

Mathematics
1 answer:
solmaris [256]3 years ago
8 0
Take the complex zero 1+i. There must be another zero 1-i to balance it, so we have the factors (x-1-i)(x-1+i)=x²-2x+1+1=x²-2x+2.
So the polynomial is (x+3)(x²-2x+2)=x³-2x²+2x+3x²-6x+6=x³+x²-4x+6, option D.
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A bag contains 8 black beads and 4 white beads. If 2 beads are drawn at random, what is the probability that both beads are blac
maria [59]

Answer:

14/33

Step-by-step explanation:

The total amount of beads is 8+4 = 12.  8 of these are black beads, so that is what we want, so 8/12 or 2/3.  For the second one, one black bead is already taken so 8-1 = 7 are left and for the total 12 - 1 = 11 are left, so 7/11.  Multiply this by 2/3 and we get 14/33.

3 0
3 years ago
Point D What is the slope of the graph of 6x + 12y = 7? A. 1/2 B. -1/2 C. 2 D. -2
Dima020 [189]
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8 0
3 years ago
Indigo Depot is having a clearance sale of their fall items. A jacket that originally cost $120 before any discount is on sale f
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Answer:

The final price is $66.

Step-by-step explanation:

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x = 0.55*120 = 66

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D.
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