Find all rational zeros of P(x) = x3*cubic* - 7x + 6.  Select the correct option:
A) 1,2,-3  B) 2,2,-5  C) 1,4,-7  D) 4,3,-1  E) 3,3,-8
P(x) = x3*cubic* - 7x + 6 : given   leading coefficient 1 and its factors are : +1,-1   constant term is 6 and its factors are : +1,-1,+2,-2,+3,-3,+6,-6   possible rational zeros : +1,-1,+2,-2,+3,-3,+6,-6   test : P(1) = 0, P(2) = 0 and P(-3) = 0   x = 1, x = 2 and x = -3 are the zeros of P(x).   correct answer is 1,2,-3) 1,2,-3
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Find all rational zeros of P(x) = x3*cubic* - 7x + 6.