Question

Determine the zeros of f(x) = x4 – x3 + 7x2 – 9x – 18.

Answer 1

You can easily tell that one answer will be x-1 or x+1

Answer 2

how can you tell ?
and
@ganeshie8 how do i make it even terms so i can simplify them ?

Answer 3

well, check the coefficients, if they can somehow add up to 0, then x-1 or x+1 are zeros.