SOLUTION: Assuming that x \neq -5, simplify (2x + 10)^4 - (x + 5)^3 + \frac{4x^2 - 5x + 17}{(x + 5)^2}. Write the expression as a single fraction.

Algebra ->  Expressions-with-variables -> SOLUTION: Assuming that x \neq -5, simplify (2x + 10)^4 - (x + 5)^3 + \frac{4x^2 - 5x + 17}{(x + 5)^2}. Write the expression as a single fraction.      Log On


   



Question 1209038: Assuming that x \neq -5, simplify (2x + 10)^4 - (x + 5)^3 + \frac{4x^2 - 5x + 17}{(x + 5)^2}. Write the expression as a single fraction.
Answer by mccravyedwin(409) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming that x \neq -5, simplify (2x + 10)^4 - (x + 5)^3 + \frac{4x^2 - 5x + 17}{(x + 5)^2}. 
Write the expression as a single fraction.

I don't know that notation.  It sure doesn't work on this site because it stays
just like you typed it.  I asked AI, and it said it meant to simplify this:



which would be written 

(2x+10)^4-(x+6)^3 + (4x^2-5x+17)/(x+5)^2, x<>-5

in standard notation.

I doubt that that monster can be written much simpler than it already is:

First I'll divide out the third term, which is a fraction:

%284x%5E2-5x%2B17%29%2F%28x%2B5%29%5E2%22%22=%22%22%284x%5E2-5x%2B17%29%2F%28x%5E2%2B10x%2B25%29

                            4
x2 + 10x + 25)4x2 -  5x +  17
              4x2 + 40x + 100
                   -45x -  83   

4+%2B+%28-45x-83%29%2F%28x%5E2%2B10x%2B35%29%22%22=%22%224+%2B+%28-%2845x%2B83%29%5E%22%22%29%2F%28x%2B5%29%5E2%22%22=%22%224+-+%2845x%2B83%5E%22%22%29%2F%28x%2B5%29%5E2

Next we'll simplify the first two terms, using the binomial expansion:

%282x%2B10%29%5E4-%28x%2B6%29%5E3






16x%5E4%2B320x%5E3%2B2400x%5E2%2B8000x%2B10000-x%5E3-18%2Ax%5E2-108%2Ax-216

16x%5E4+%2B+319x%5E3+%2B+2382x%5E2+%2B+7892x+%2B+9784

Now we'll add the simplification of the fraction term

16x%5E4+%2B+319x%5E3+%2B+2382x%5E2+%2B+7892x+%2B+9784%22%22%2B%22%224+-+%2845x%2B83%5E%22%22%29%2F%28x%2B5%29%5E2

, x%3C%3E-5

Not a heck of a lot simpler.  

Edwin