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    x2 +3x -2=0 and has root a and b

    without solving the equation find the value of [a-(3/b^2)] * [b-(3/a^2)]

    i get (ab)^2 (a3b3 - 3a3b2-3a2b2 +9) but i need it all in (a+b) or (ab)^n and i dont seem to be able to get the -3a3b2 in that form
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    Have you typed this right? Should it be  \displaystyle \left (a-\frac{3}{b^2} \right )\left (b-\frac{3}{a^2} \right ) ?
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    (Original post by B_9710)
    Have you typed this right? Should it be  \displaystyle \left (a-\frac{3}{b^2} \right )\left (b-\frac{3}{a^2} \right ) ?

    ya it should be lol been revising for too long my brain is like mush how areyou using math print on hear is it a program
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    (Original post by Daz0101)
    ya it should be lol been revising for too long my brain is like mush how areyou using math print on hear is it a program
    http://www.thestudentroom.co.uk/wiki/LaTex
    I expand it to get  \displaystyle ab-3\left ( \frac{a+b}{ab} \right ) + \frac{9}{(ab)^2 } .
 
 
 
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Updated: July 22, 2016
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