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Re: Defining a function


b[a_, x_] := Evaluate[b /. Solve[{a == x+y, b == x*y}, b, y][[1]]];

b[a, x]

(a - x)*x


Bob Hanlon

In a message dated 2001/4/28 9:45:39 PM, yarblocks at yahoo.de writes:

>I have for example:
>
>a = x + y and
>b = x*y
>
>whats the procedure to express b as a function of a in Mathematica?
>


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