$21+x^2 +(x+1)+16+22+17+x = 100$%

The solution guide gives me $x^2 + 2x + 76 = 100$

Then $x^2+2x-24=0$

I just don't get where $x+1$ went..

I keep getting $x^2+2x+77=100$ what am I doing wrong somebody help me![enter image description here]1


  • $\begingroup$ This is on the GRE general test? I'm impressed. I don't recall there being quadratic equations when I took the test in $2008$. They're raising the bar! $\endgroup$ – Matt Samuel Mar 2 '17 at 3:30
  • $\begingroup$ $21 + 16+ 22 + 17 = 76$ and the $1$ from $(x+1)$ gives $77$. I'm with you. Either the solution's wrong or there's something you aren't telling us that changes things $\endgroup$ – spaceisdarkgreen Mar 2 '17 at 3:30
  • 1
    $\begingroup$ Something is not right in the exercise. We are combining three odd numbers and the solution manual has a constant of 24. Double check or provide us with a picture of the page. Normally inserting page pictures to solve a problem is not so well appreciated, but if a mistake in a textbook is perceived, we would like to take a look at it... $\endgroup$ – imranfat Mar 2 '17 at 3:31
  • $\begingroup$ I've added the image of problem pls help me asap $\endgroup$ – Sooo Mar 2 '17 at 3:39
  • $\begingroup$ this is a practice problem for gre $\endgroup$ – Sooo Mar 2 '17 at 3:46

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