Posted by Leanna on Sunday, September 12, 2010 at 10:11pm.
If the solutions are 1 and -2, and assuming f(x) is a polynomial, then
f(x)=k(x-1)(x+2)
and
f(2x) = k(2x-1)(2x+2)
implying
2x-1=0 or (2x+2)=0
Solve for x.
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