........ in first term, write
as then group first two and second two terms
........factor out
........reduce and , then and in nominator and denominator
........reduce and
finaly, you will have:
........
2.......
first we can do some factorization:
look first this expression:
Replace with and group the first two terms together
and the last two terms together like this: ……
factor a out of the first group and factor a out of the
second group …… factor a out
and you will have:
then, look at this expression:
Replace with and group the first two terms together
and the last two terms together like this:
……
factor a out of the first group and factor a out of the second group
…… factor a out
and you will have:
then, this expression we can write as
at the end, take a look at this expression:
Replace with and group the first two terms together
and the last two terms together like this:
……
factor a out of the first group and factor a out of the second group
…… factor a out
and you will have:
