to add and subtract rational expression with unlike denominators you can do the following steps

Step in adding or subtracting rational expressions with unlike denominators.
6 2
(ײ-2)(×+2) ײ-5×+6
1.Factor the denominator of each fraction to help find the LCD
6 2
(×-2)(×+2) (×-2)(×-3)
2.Find the least common denominator(LCD)
LCD:(×-2)(×+2)(×-3)
3.Multiply each expression by its LCD.
6(LCD) 2(LCD)
(×-2)(×+2). ​