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anonymous
 4 years ago
if x=.28 determine the three real solutions (zeros) of F(X)=x^57x^4+10x^3+14x^221x
anonymous
 4 years ago
if x=.28 determine the three real solutions (zeros) of F(X)=x^57x^4+10x^3+14x^221x

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What does it mean by if x=0.28?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0it's a function and .28 has to be plugged in where there is an X

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay x^57x^4+10x^3+14x^221x=0 x(x^47x^3+10x^2+14x21)=0 So one solution is x=0. If we divide through by x we are left with x^47x^3+10x^2+14x21=0 which has two complex solutions and two real ones.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i did not get the last part???

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I just took the x to the other side so I would be left with x^47x^3+10x^2+14x21=0 I check wolfram and the are two real solutions and two complex one. http://www.wolframalpha.com/input/?i=x^57x^4%2B10x^3%2B14x^221x These other solutions we can estimate but not find exact answers.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What grade/ level are you in?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i am in high school senior year

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay good, one way we can estimate is by graphing it on your graphics calculator and have it estimate the other two solutions. Another way is to write it up in a program and use Newton's Method or another root finding tool.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yeah i have a graphing calc so how would i do it? if u can help me!!! please

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay first off we need to graph y=x^57x^4+10x^3+14x^221x, are you able to do this? What model/brand is your graphics calculator?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Good, that's the calculator I had in high school too. Makes this easier.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't have the calculator anymore, but there should be some option called zeros or roots. Choose that option

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0it says lef bound? right bound?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0good, now for the left bound you want to choose the closest point you can get before the graph crosses the x axis for the right bound you want to get it as close to x axis after you've crossed it.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Remeber you have to do this step for each point the graph crosses the xaxis. So for your function you need to do this 3 times to get all the real roots.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What answers are you getting?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Good work, that's correct. :D
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