Combined operations with algebraic fractions
Answers are for parents and teachers.
1
Simplify (1/x - 1/y) : ((y - x)/(xy)).
1
2
Simplify a/(a - 3) - 9/(a² - 3a).
(a + 3)/a
3
Simplify (a² - 1)/a · (a/(a - 1)).
a + 1
4
Find the value of (a + 3)/a at a = 3.
2