# Math Help - Simplify ......

1. ## Simplify ......

Simplify

[(-16x^2+29x+6)-(16t^2+29t+6)]/x-t

I noticed I can factor into (-x+2)(16x+3) etc..

But, they are asking me to simplify. As far as I know, all this means is that I can simplify the top and get, [-16x^2+29x+16t^2-29t]/x-t. Do you think this is what they want? Or am I missing something?

2. ## Re: Simplify ......

Originally Posted by StudentMCCS
Simplify

[(-16x^2+29x+6)-(16t^2+29t+6)]/x-t

I noticed I can factor into (-x+2)(16x+3) etc..

But, they are asking me to simplify. As far as I know, all this means is that I can simplify the top and get, [-16x^2+29x+16t^2-29t]/x-t. Do you think this is what they want? Or am I missing something?
OK first of all, I doubt you could have written the question correctly. Should the second lot of brackets start with -16t^2?

3. ## Re: Simplify ......

Originally Posted by StudentMCCS
Simplify

[(-16x^2+29x+6)-(16t^2+29t+6)]/x-t

I noticed I can factor into (-x+2)(16x+3) etc..

But, they are asking me to simplify. As far as I know, all this means is that I can simplify the top and get, [-16x^2+29x+16t^2-29t]/x-t. Do you think this is what they want? Or am I missing something?
Hey, great start. You're almost there. Once you're at this stage:

$\frac{(-16x^2+29x+16t^2-29t)}{x-t}$

Rewrite:

$\frac{(16t^2-16x^2+29x-29t)}{x-t}$

Partially factor:

$\frac{(16(t+x)(t-x))+29(x-t))}{x-t}$

Rewrite, changing the signs of the $16$ and then second bracket (changing the $16$ to $-16$ is the same as multiplying through by $-1$, changing the signs of the second bracket multiplies through by $-1$ again, so the end result is unchanged):

$\frac{(-16(t+x)(-t+x))+29(x-t))}{x-t}$

Rewrite again, just for clarity:

$\frac{(-16(t+x)(x-t))+29(x-t))}{x-t}$

And then we can cancel:

$-16(t+x)+29$ (remembering that $x\neq t$)

4. ## Re: Simplify ......

Originally Posted by Prove It
OK first of all, I doubt you could have written the question correctly. Should the second lot of brackets start with -16t^2?
Yes, I am sorry for that. ....-(-16t^2...

Thanks!

6. ## Re: Simplify ......

Originally Posted by StudentMCCS
Yes, I am sorry for that. ....-(-16t^2...
Quacky's post shows the solution with the fixed sign