LINK TO WJEC FP1 PAST PAPERS
WJEC SPECIFICATIONS FOR THIS TOPIC
TOPIC 
NOTES 
The number and nature of the roots of polynomial equations, real and complex roots.
Repeated roots.

Candidates will be expected to know that an nth degree polynomial equation has n roots.

The occurrence of the nonreal roots of a polynomial equation with real coefficients in conjugate pairs.


Relationships between the roots and coefficients of a polynomial equation.

The degree of the polynomial will not exceed 3.

These notes are taken from Wikibooks
ROOTS OF QUADRATICS
If we need to find the roots of a given quadratic function we have two formulae that can help us to find the roots of a quadratic equation.
ROOTS OF CUBICS
Roots Of Cubic Equations
If we need to find the roots of a given cubic function we have three formulae that can help us to find the roots of a cubic equation.
Let
and
be the roots of
. Then,
Where:
And:
Comments (2)
lovemath said
at 6:48 pm on Feb 13, 2009
Could anybody here help with this roots question here http://www.thestudentroom.co.uk/showthread.php?t=814687
Currently nobody on the site has been able to solve it using the method I have specified, I can solve it the other way, but would like to understand both methods.
Steph Richards said
at 6:01 pm on Feb 14, 2009
Tried to register on student room but got to wait.
Not sure why you WANT to do it this way as the question part a LEADS you to use sum product etc.
But never mind! I have tried rearranging before cube both sides but sadly got nowhere too. Perhaps you could follow this up
(u^2/35u^1/3)^3 =(7)^3
I couldnt get it to work but variations on this may!
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