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DeadShot
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Determine the zeros of f(x) = x4  x3 + 7x2  9x  18.
 one year ago
 one year ago
DeadShot Group Title
Determine the zeros of f(x) = x4  x3 + 7x2  9x  18.
 one year ago
 one year ago

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shubhamsrg Group TitleBest ResponseYou've already chosen the best response.0
1 fits in.
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.0
Got it, break 7 as 92 /
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
so \[\pm 1\] is the answer?
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.0
What do get after writing 7 as 92 ?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
\[x^4  x^3 + 9  2x^2  9x 18\] ?
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.0
x^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 ?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
yeah, factor each binomial, right?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
(x^2 + 1) (x^2 + 9) for the first one?
 one year ago

shubhamsrg Group TitleBest ResponseYou've already chosen the best response.0
try again.
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
I'm confused
 one year ago

amoodarya Group TitleBest ResponseYou've already chosen the best response.0
x1 = 2 x2 = 1 x3 = 0 + 3i x4 = 0  3i
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
So, substitute (0  3i) and 1 for x^2, making it ((0  3i) + 9(1))?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
so, then it would become (3i  9)
 one year ago

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

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
So, divide x^4  x^3 + 7x^2  9x  18 by x^2 + 9 ?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
so it would be x^2  x + 7  x  2 ?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
combine like terms, and it would be x^2  2x + 5 , right?
 one year ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Hmm.. Looks like you have 2 real zeros and 2 imaginary.
 one year ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Do you still need help?
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
yes, I don't know what to do next
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
I got it! Thanks!
 one year ago
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