I suck at math,and i want to change that perspective

[ladykimchi]

So,I'm preparing for my exam that's why i need to study study and change my perspective about math,that's why i just want to ask you if is it possible for me to solve w/o arranging the variables into descending order(attached file)

[eigrihs123]

Hello ladykimchi,

I really understand how frustrating it is that after all the effort you have given to understand the lesson, you still can't get what you want to understand. But that is a staging process. You can't force yourself to understand the lesson easily because it would really take a lot of understanding, determination and effort. I can see that you are actually doing the right thing. I know time will come that you can be able to understand Mathematics easily.

Now, going back to your question. You have given the equation which can be easily manipulated if you have the patience to understand it. While you can still solve the equation without arranging variables in descending order, I would rather recommend to arrange it. It's a division, and you need to arrange it descending order to easily solve the problem.

Can you show me your solution? I will check it and correct whatever you missed out on the process.

[ladykimchi]

(07-19-2010 01:42 PM)eigrihs123 Wrote:  Hello ladykimchi,

I really understand how frustrating it is that after all the effort you have given to understand the lesson, you still can't get what you want to understand. But that is a staging process. You can't force yourself to understand the lesson easily because it would really take a lot of understanding, determination and effort. I can see that you are actually doing the right thing. I know time will come that you can be able to understand Mathematics easily.

Now, going back to your question. You have given the equation which can be easily manipulated if you have the patience to understand it. While you can still solve the equation without arranging variables in descending order, I would rather recommend to arrange it. It's a division, and you need to arrange it descending order to easily solve the problem.

Can you show me your solution? I will check it and correct whatever you missed out on the process.

these are my solutions to those problems,but then i didn't continued the division part

[eigrihs123]

Our Main vairable here is X, so we must do this:

For numerator, we should arrange this way:

(2x^3-9x^2y+17xy^2-12y^3)

You notice that X is in descending order, and Y is in ascending order

Then for the denominator, let us simplify by multiplying:

(2x-3y)(5+3x^2-4x)

=10x+6x^3-8x^2-15y-9x^2y+12xy
=6x^3-8x^2+10x-9x^2y+12xy-15y

Multiply this to another term:

(6x^3-8x^2+10x-9x^2y+12xy-15y)(5x^2+x-3)

=30x^5+6x^4-18x^3-8x^4-8x^3-24x^2+50x^3+10x^2-30x-45x^4y-9x^3y+27x^2y+160x^3y+12x^2y-36xy-75x^2y+15xy+45y
=30x^5-2x^4+24x^3-14x^2-30x-45x^4y+151x^3y-111x^2y-21xy+45y

So, you must divide this:

(6x^3-8x^2+10x-9x^2y+12xy-15y)/ (30x^5-2x^4+24x^3-14x^2-30x-45x^4y+151x^3y-111x^2y-21xy+45y)

See, it is now easy to divide.

[ladykimchi]

that really helps,but what about the multiplication,am i correct w/ my answer?

[eigrihs123]

You mean there are two items in your first screenshot? What I did is multiply all three terms in the denominator. I am doing the wrong thing then.

Please neglect my answer above...

For multiplication, this is the correct answer:
=25x^2-15+5x+15x^4-9x^2+3x^3-20x^2+12x-4x^2

=15x^4+3x^3-8x^2+17x-15

you are wrong on your last term 4x^3, that is suppose to be 4x^2 because you multiply 4x by x.

[ladykimchi]

oh,I realized my mistake when I recomputed it,thanx to your observation,uhmm,anyways,Would you mind checking my answers in trigonometry

[eigrihs123]

yeah sure. just bring it on and I will check it.

[zencontrol]

Math SUCKS!!!!

at first......


but if you will get the hung of it, you will really enjoy it.

It is just a matter of perseverance, dedication and determination to understand math lessons

[ladykimchi]

(07-20-2010 12:18 PM)eigrihs123 Wrote:  yeah sure. just bring it on and I will check it.

so,the 1st and 2nd pic are my illustration of the problem and the 3rd one is my solution to the problem