how do I solve this problem .....algebra....rational expressions?

Question

Problem........x/x^2-xy - y/xy-x^2 This is exactly how it is written in the book.........need to find common demoninator first......help....ask the question once but got wrong answers...

Answer 1

Providing that your assignment goes like this:
x/(x^2-xy) - y/(xy-x^2) =

x/(x^2-xy) - y/(-1)(x^2-xy) =
= x/(x^2-xy) + y/(x^2-xy)
= (x+y)/(x^2-xy)
= (x+y)/[x(x-y)]

if you go on, you could only get:
= x/(x(x-y)) + y/(x(x-y))
= 1/(x-y) + y/(x(x-y))

but I don't see any point in this.

Answer 2

at the same time as there is no signal between numbers/variables, that means multiplication. So your equation should be written 2*x*y*z+5. you recognize the values of the variables, so that you in effortless words change those values for the corresponding letter. The equation now sounds like: 2*2*3*4+5 You carry out multiplication earlier addition and also you may do the multiplication steps one after the different. 2*2=4, so as that answer situations the subsequent quantity. 4*3=12, then that answer situations the subsequent 12*4=40 8, and then finished the addition, 40 8+5=fifty 3.