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anonymous
 one year ago
Which of the following represents the zeros of f(x) = x3 − 14x2 + 61x − 84?
anonymous
 one year ago
Which of the following represents the zeros of f(x) = x3 − 14x2 + 61x − 84?

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.1try some of the factors of 84 f(4) = 0 so (x 4) is a factor

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1now as 84 is the last term and x  4 is a factor you could see if the factors of 21 could be zeros try finding f(3) and f(7)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.13 is a zero i meant

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes, may u help on another?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you need to check that f(3) and f(7) = 0

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1i checked f(3) it is = 0 so 3 is a zero

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and i checked 7 and it is a zero

welshfella
 one year ago
Best ResponseYou've already chosen the best response.13 is not a factor (x 3) will be a factor

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0may you help on a nother

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1f(7) also = 0 yes 4,3 and 7 are correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following is a polynomial with roots 3, 5i, and −5i?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1if x = 3 then one factor will be (x  3) and the other 2 will be (x + 5i) and (x  5i) what do you get when you multiply x + 5i and x  5i ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1not quite (x  5i)(x + 5i) = x^2 + 5xi  5xi 5i*5i = x^2  25i^2 = x^2  25* 1 = x^2 + 25 remember that i^2 = 1

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so to get your polynomial you must multiply: ( x  3)(x^2 + 25)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then we multiply by (X3) for the answer right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@welshfella what is our final answer?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1well do the multiplication (x  3)(x^2 + 25) = x^3 + 25x can you continue?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you need to multiply the second parenthesis by 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0f(x) = x^3 − 3x^2 + 15x − 75 IS THAT THE ANSWER?
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