# Math Help - Performing Operations?

1. ## Performing Operations?

Something so different from what I taught. I have no idea how to solve this.

$24x^2z^2-2x^2z^2+x^2+z^2$

$(x+y+xy)-(3x+4x^2)$

NOTE: the exponents behind the z's are suppose to be -2.

2. Solve what actually?

I see no equation or a problem. Only two strings of variables I suppose?

3. Originally Posted by Dinkydoe
Solve what actually?

I see no equation or a problem. Only two strings of variables I suppose?
It says to perform each of the operation and put the answers in descending order with regard to the x variable.

4. Originally Posted by deekay930
Something so different from what I taught. I have no idea how to solve this.

$24x^2z^{-2}-2x^2z^{-2}+x^2+z^{-2}$
Did you notice that the x and z dependence of the first two terms are exactly the same? Combine them. If you were told "put the answers in descending order with regard to the x variable", since all three terms have $x^2$, they can be in any order

$(x+y+xy)-(3x+4x^2)$
x- 3x= -2x.

NOTE: the exponents behind the z's are suppose to be -2.
So use "z^{-2}".