# Thread: New guy willing to make a change

1. ## New guy willing to make a change

Ok so basically, I am 18, currently studying computing at university, and hopeless at maths.

I have always been a boss at quickly adding things together or solving logical problems (hence I own ass at programming algorithm solving). Sadly however, I am hopeless with algebra. I am completely useless when it comes to things such as the order of operations, learning all of the different rules (such as the exponent rules, logarithm rules, quadratic rules ect). I simply can't keep that much in my head. While I am completely hopeless, I always seem to get passing marks of 60% or more with little effort, however I am tired of completely re learning everything over and over after forgetting it.

So I was thinking maybe I should learn maths the right way and start from scratch before it's too late (because I had a test just earlier and I know I failed that, which rarely happens).

Bottom line, I suck at maths because I have no interest in it. I rape at electronic system design and algorithm design because they actually interest me (and I usually fluke the math in the process). So maybe I need to spark an interest. So feel free to post some of the awesome things you have been enabled to do since you became a maths master, maybe I will gain interest.

Also can someone tell me how to solve this. I was looking at it for ages and I clearly failed to do it properly:

Two numbers whos product is 15.78 and whos sum has a difference of 1.15

2. ## Re: New guy willing to make a change

Welcome to the forum.

Originally Posted by SplashDamage
Two numbers whose product is 15.78 and whose sum has a difference of 1.15
This is an incomplete sentence. What do you need to do with it? Also, what does it mean for the sum of two numbers to have a difference of 1.15?

3. ## Re: New guy willing to make a change

I completely wrote that wrong. Let up on the grammar policing btw.

Two numbers with a product of 15.78 and a difference of 1.15.

4. ## Re: New guy willing to make a change

xy = 15.78
x - y = 1.15

From the second equation, y = x + 1.15. Substituting y in the first equation, we get

(y + 1.15)y = 15.78
y^2 + 1.15y - 15.78 = 0

You can solve this using the quadratic formula and then find x from the second equation above. I believe the two solutions are x = -3.4388, y = -4.5888; x = 4.5888, y = 3.4388.

5. ## Re: New guy willing to make a change

Concerning grammar, attention to such details has a long tradition in math and physics. Here is an anecdote about the physicist Paul Dirac.

At the quesiton period after a Dirac lecture at the University of Toronto, somebody in the audience remarked: "Professor Dirac, I do not understand how you derived the formula on the top left side of the blackboard."

"This is not a question," snapped Dirac, "it is a statement. Next question, please."

6. ## Re: New guy willing to make a change

Ok thanks for that. I did something kind of similar, however it was clearly wrong.

Something like x = y + 1.15
and then try substitute that into y = x - 1.15 ....... y = (y + 1.15) - 1.15

I don't know what I was trying to do lol.