Question

Determine the zeros of f(x) = x3 - 12x2 + 28x - 9.

Answer 1

try factoring :)

Answer 2

so, I'd remove the x^2 from the first two terms, making it x^2 (x - 12 + 28x - 9)?

Answer 3

and then combine like terms, making it x^2 (29x - 21)

Answer 4

... you can't just remove x^2 from the front. what about the back? you get x^2(x - 12) + 28x - 9

Answer 5

start by hit and tril, put x=1, -1, 2, -2 till u get f(x)=0

Answer 6

ok