Question

From which graph can you best find the solution to the equation (2/x)+(15/x^2)=1?

Answer 1

Here are the options A, B, C, and D I keep getting none of these, I don't understand? The solution to the equation is -3,5

Answer 2

I keep getting this graph like the one on this website, but it says find best solution which one is the best? they all don't seem right??

http://www.wolframalpha.com/input/?i=solution+2%2Fx%2B15%2Fx%5E2%3D1

Answer 3

Here, so your equation is \(\huge\color{blue}{ \frac{2}{x} + \frac{15}{x^2} =1}\)

Answer 4

Yes!

Answer 5

Ok, I'll type it out step by step. Focus.

Answer 6

\[\huge\color{blue}{ \frac{2}{x}+\frac{15}{x^2} =\frac{1}{1} } \]

Answer 7

\[\huge\color{blue}{ \frac{2x}{x^2}+\frac{15}{x^2} =\frac{1}{1} } \]

Answer 8

\[\huge\color{blue}{ \frac{2x+15}{x^2} =\frac{1}{1} } \]

Answer 9

Cross multiply.

\[\huge\color{blue}{ 2x+15 =x^2} \]

Answer 10

\[\huge\color{blue}{ -x^2+2x+15 =0} \]

Answer 11

\[\huge\color{blue}{ x^2-2x-15 =0} \]

Answer 12

\[\huge\color{blue}{ x^2-2x =15} \]

Answer 13

\[\huge\color{blue}{ x^2-2x+1 =15+1} \]

\[\huge\color{blue}{ x^2-2x+1 =16} \]

Answer 14

\[\huge\color{blue}{ (x-1)(x-1)=16} \]\[\huge\color{blue}{ x-1=± 4} \]\[\huge\color{blue}{ x=1± 4} ~~~~~~~~~x=~5~~~~or~~-3\]

Answer 15

Right :) same solution i got! but how do u relate this to my graph dilemma?

Answer 16

I can't really say, because the attachment doesn't work for me.

Answer 17

Which on the doc. doesn't work?? graphABCD i can draw the four options!

Answer 18

Yeah, the graph ABCD doesn't work.

Answer 19

Option A