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When solving the polynomial inequality 4x^5 - 18x^4 + 18x^3 ≥ 0 how many graphs will you draw before you draw your final graph? A. two B. four C. five D. six

Mathematics
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Please help! :(
http://www.wolframalpha.com/input/?i=4x%5E5+-+18x%5E4+%2B+18x%5E3+%E2%89%A5+0&dataset=
4x^5 - 18x^4 + 18x^3 ≥ 0 divide it by x^2 so it's 4x^3 - 18x^2 + 18x ≥ 0 for the x>0 it's 4x^2 - 18x + 18 ≥ 0 (first graph) and for the x <0 it's 4x^2 - 18x + 18 < 0 (second graph) if you draw the first graph the the impossible rations for x>0 is \[\left( 0 , 1.5 \right) \cup \left( 3 , \infty \right) \cup \ { 0 , 1.5 , 3}\] but the second graph for the x<0 doesn't have any rations so the total answer is \[\left( 0 , 1.5 \right) \cup \left( 3 , \infty \right) \cup \ { 0 , 1.5 , 3}\]

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Other answers:

@amir.sat Sorry I don't understand :(
which part?
Now I understand, so when solving the inequality, 2 graphs will be drawn before the final graph?
the point is that you divide an inequality by variable that can be negative you should separate it to two inequality one for the negative variable and one for the positive variable
Hmm... ok
then what would be the right answer?
all of 'em i meant the sum of each seperated graph's answer
Sorry, I am confused:(
you separated the inequality into two inequality when you divide it by a variable i meant the answer is the sum of the separated inequality's answer
So the right answer would be A ?
oh sorry .yes it's A i didn't see the options , i just thought it's just the questions
No prob. Thank you a lot!!! :)
ur welcome

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