The Purplemath Forums

Greetings, I am about to enter an Engineering program after several years out of school. I took high-school calculus ten years ago but I was not a good student and mainly coasted through the work. I had decent marks (80+) but no retention of the theory. The university has provided me with a 50-page ...

Thanks a ton, I had no idea how to get through that! Evidently my ignorance is greater than I thought...

I have tried the steps indicated on the site, and am getting closer to the answer. But I still cannot figure out where the minus sign is coming from! There are no negatives whatsoever in the expression so I don't understand how this is happening. Current Attempt: 1. ((y/x)+ x) / (2/x) 2. Find common...

Haha, that certainly explains that! I was tearing my hair out trying to figure out what the heck was wrong. I've even had my roommate come verify the question and answer (without telling them what I thought it was) to make sure I hadn't misread it or something.

Thanks again for the help!

Hello, I am struggling with the following question and was hoping for some assistance: How many real solutions does this equation have?: (x^4) - (5x^2) +6 = 0 I inserted the brackets to make it easier to read. The solution in the book reads '4', with no other details whatsoever. The first step I did...

Haha, I just redid the problem and had no trouble once I paid attention to the exponents affecting -x

Guess this one's solved?