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anonymous
 4 years ago
plzz help ...
Solve each polynomial equation
1. 15x^3119x^210+16=0
2. x^314x^2+47x18=0
3. 5x^327x^217x6=0
anonymous
 4 years ago
plzz help ... Solve each polynomial equation 1. 15x^3119x^210+16=0 2. x^314x^2+47x18=0 3. 5x^327x^217x6=0

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Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1I notice that these are all cubics. So I would first try to factor by grouping and if that doesn't work, then try synthetic division.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0how do i do synthetic division with no divisor or watever its called?

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1Let's look at the first one.. The constant term is 16 and the coefficient of the x^3 term is 15. So the possible rational roots are the factors of 16 over the factors of 15 Use those for your "shelf" numbers in the synthetic division process. If you get a remainder of 0, that number is a root.

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1So the possible rational roots are:\[\pm1, \pm2,\pm4,\pm8,\pm16,\pm1/3,\pm1/5,\pm1/15,\pm2/3,\pm4/3,\pm8/3,\pm16/3,\pm2/5,\pm4/5\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so i take the numbers and do what?

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1So we see that 8 is a root and (x8)(15x^2+x2) are factors.

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1Take the second factor 15x^2+x2 and use the quadratic formula on it and find the other roots.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so then the answer is 15x^2x2x omg thaks i get it!!!

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1I actually cheated and used a graphing calculator to find the 8

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1No that is not the answer. The 3 answers are 8 and whatever you get when you solve 15x^2+x2=0

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohhh so how do i find that out?

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1Don't you know how to solve a quadratic equation with the quadratic formula?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0is that the b +or  one?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sweet i get it now thank you!!!

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\left\{5 x^3119 x^210 x+16=0,(x8) (3 x1) (5 x+2)=0\right\}\left\{x^314 x^2+47 x18=0,(x9) \left(x^25 x+2\right)=0\right\}\left\{5 x^327 x^217 x6=0,(x6) \left(5 x^2+3 x+1\right)=0\right\} \]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i got for the first one 1dw:1327021163596:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327021250750:dw this is the answer??

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.1Don't you see where I solved it for you?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0oh sorry i wasnt looking .. lol
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