Question

What steps assist with adding and subtracting rational expressions?

Answer 1

@jim_thompson5910

Answer 2

In order to add any fractions, the denominators must be the same

example: 1/8 + 3/8 = 4/8

the denominator is left alone and you add the numerators

Answer 3

This applies to algebraic expressions as well

example

1/(x+4) + 3/(x+4) = 4/(x+4)

Answer 4

If the denominators are not the same, then you have to figure out the LCD and get the denominators all equal to the LCD

This is one example

http://www.mathportal.org/algebra/rational-expressions/adding-subtracting-rational_files/11.gif