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Evaluate this algebraic expression f(a,b)

  1. Sep 28, 2012 #1
    I do not have access to the math calculators.
    Δ = 162*(a-b)*(a^2-b^2)*(a^3-b^3) -108*(a^3-b^3)*(a-b)^3 + 81*(a-b)^2*(a^2-b^2)^2 - 108*(a^2-b^2)^3 - 27*(a^3-b^3)^2

    thanks
     
  2. jcsd
  3. Sep 28, 2012 #2

    haruspex

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    Take out some factors to make t simpler. 9 is obvious. (a-b) is another (twice). Several terms have other factors in common, so combine those first.
     
  4. Sep 28, 2012 #3
  5. Sep 28, 2012 #4
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