* Problem*: If are the roots of the equation , find the equation whose roots are , , .

* Solution*: are roots of

= ,

=

=

Now,

+ +

=

= –

=

= – 2 + +

=

=

+ +

= – 3 + –

= –

So the equation whose roots are , , is

* Problem*: If are the roots of the equation , find the equation whose roots are , , .

* Solution*: are roots of

= ,

=

=

Now,

+ +

=

= –

=

= – 2 + +

=

=

+ +

= – 3 + –

= –

So the equation whose roots are , , is