Hayhayz
  • Hayhayz
Which of the following is a polynomial with roots 5, 4i, and −4i? f(x) = x3 − 5x2 + 20x − 16 f(x) = x3 − 5x2 + 16x − 80 f(x) = x3 − 20x2 + 5x − 16 f(x) = x3 − 16x2 + 80x − 5
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
give me a sec will help u out
Hayhayz
  • Hayhayz
Thank you
anonymous
  • anonymous
B.

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More answers

Hayhayz
  • Hayhayz
Can you tell me how you got that?
anonymous
  • anonymous
okay when we do this just bring down the 5. 4*4=16 so this how we got 16 and we just multiply 5*4*4 which equals 80. does that make sense
Hayhayz
  • Hayhayz
Ohhh yes that does make sense! Could you help me with another?
anonymous
  • anonymous
for sure
Hayhayz
  • Hayhayz
Which of the following is a polynomial with roots 4, 6, and −7? f(x) = x3 − 3x2 − 24x + 42 f(x) = x3 − 3x2 − 46x + 168 f(x) = x3 − 24x2 − 42x + 46 f(x) = x3 − 24x2 − 46x + 168 I was gonna do this one based of the answer you gave me from the last one but I guess you have to do this one differently?
anonymous
  • anonymous
this is a little different u are still multiplying all the number 4,6 &7 to get 168 but the difference is you will multiply 4*6= 24 so D is our I mean your answer lol
Hayhayz
  • Hayhayz
I was thinking it was D but I just wanted to see what you said haha thanks so much
anonymous
  • anonymous
anytime hayz, u sound like a nice girl, don't know why anyone would not want to help u.
Hayhayz
  • Hayhayz
One more please? haha last one I promise!
anonymous
  • anonymous
its okay bring it on lol
Hayhayz
  • Hayhayz
Which of the following represents the zeros of f(x) = x3 − 14x2 + 61x − 84? 7, 4, −3 7, 4, 3 7, −4, −3 7, −4, 3
anonymous
  • anonymous
wait the prone is written in stander form If the polynomial is written in the standard form f(x) = x^3+ax^2+bx+c then the sum of roots should be -a = +3 and the product of roots should be -c = -168. So a = -3 and c = +168. Therefore the answer is B. sorry
Hayhayz
  • Hayhayz
thank you!

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