Simplifying and quadratics...

[ThatKid]

You have to simplify this (5/x^2+5x+6)+(7x^2+8x+15)=1 and transform it to x^3+10x+19x^2-9=0
I did the whole simplifying and cross multiplying thing ect but I can't seem to get it.

 

[lookagain]

You have to simplify this (5/x^2+5x+6)+(7x^2+8x+15)=1

and transform it to x^3+10x+19x^2-9=0

I did the whole simplifying and cross multiplying thing ect but I can't seem to get it.

ThatKid, you have at least the following errors.

1) In the first fraction, you need to have the open parenthesis immediately after the first "5."

2) a) The expression in the second set of parentheses is supposed to be a rational expression.

2) b) A "/" is to be immediately after the "7."

3) The open parenthesis is supposed to go immediately after the "/" which is missing.

4) In the cubic equation, the second term is supposed to have an exponent of "2."

5) In that same equation, the third term is just supposed to be linear in x.


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Why don't you try the problem again, now that you know that it should be this?


"Simplify this \(\displaystyle \ \ \) 5/(x^2 + 5x + 6) + 7/(x^2 + 8x + 15) = 1

and transform it into \(\displaystyle \ \ \) x^3 + 10x^2 + 19x - 9 = 0."

 

[stapel]

I did the whole simplifying and cross multiplying thing ect...

Great! Please reply showing your work. Thank you!