SOLUTION: {{{w^3=1}}}, Find the exact values of {{{(1+2w+3w^2)}}} & {{{(1+3w+2w^2)}}}, given that these are roots of the eq'n {{{x^2 + 3x +3=0}.
I did the Q, however I am just stuck on say
No complex imaginary number can be said to be "larger" or "smaller" than any
other complex numbers. Only real numbers can be said to be larger or smaller
than other real numbers.
We should do all the possibilities.
The problem from the very beginning:
Since
and
are roots of the equation
their sum is equal to the coefficient of x with the opposite sign:
So:
or
[We can check that their product will be the constant term 3, but
we don't need that.
(1) When we substitute
into
we get
-----
(2) When we substitute
into
we get
------
(3) When we substitute
into
we get the value
------
(4) When we substitute
into
we get the value
---
So, the exact values of both and ,
given that
and
are roots of the equation
Note that for , the sign of the imaginary part is
OPPOSITE the sign of the imaginary part of what is substituted, and
that for , the sign of the imaginary part is the
SAME AS the sign of the imaginary part of what is substituted.
Edwin