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anonymous
 3 years ago
Determine the zeros of f(x) = x4  x3 + 7x2  9x  18.
anonymous
 3 years ago
Determine the zeros of f(x) = x4  x3 + 7x2  9x  18.

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shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.0Got it, break 7 as 92 /

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so \[\pm 1\] is the answer?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.0What do get after writing 7 as 92 ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[x^4  x^3 + 9  2x^2  9x 18\] ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.0x^4  x^3 + 9x^2 2x^2  9x  18.=0 =>(x^4 + 9x^2)  (x^3 9x) (2x^2 18) =0 You see what should be the next step ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yeah, factor each binomial, right?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0(x^2 + 1) (x^2 + 9) for the first one?

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.0x1 = 2 x2 = 1 x3 = 0 + 3i x4 = 0  3i

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So, substitute (0  3i) and 1 for x^2, making it ((0  3i) + 9(1))?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so, then it would become (3i  9)

amoodarya
 3 years ago
Best ResponseYou've already chosen the best response.0hint : divide f(x) to x^2+9 you would find your answer!

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So, divide x^4  x^3 + 7x^2  9x  18 by x^2 + 9 ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so it would be x^2  x + 7  x  2 ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0combine like terms, and it would be x^2  2x + 5 , right?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Hmm.. Looks like you have 2 real zeros and 2 imaginary.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Do you still need help?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yes, I don't know what to do next
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