Hi

1) correct on (1/3,124/27)being the maximum turning point   |good work

2) 2x³-7x²+4x+4 = (x-2)(2x^2-3x-2) = (x-2)(2x+1)(x-2)  |x= -1/2 and x = 2

  x < -1/2 lends to f(x)< 0

always recommend sketching the graph..can be extremely helpful.

can download FREE graph software at

http://www.padowan.dk.com





 

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