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posted by Sarah on Thursday, August 22, 2013 at 11:25pm.
Let F(x)= X^2+ 5 and G9x)= (x+1) / (x-1). Find (a) F-3G and (b) F(g(x))
F-3G = (x^2+5)-3(x+1)/(x-1) = (x-2)(x^2+x+4)/(x-1) or other massaging as you wish F(G) = G^2+5 = [(x+1)/(x-1)]^2 + 5 = 2(3x^2-4x+3)/(x-1)^2
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