Use the given zero to find the remaining zeros in the function. f(x)= x^4-32x^2-144 ; zero: -2i Thanks

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Hi. Originally Posted by relichunter09 Use the given zero to find the remaining zeros in the function. f(x)= x^4-32x^2-144 ; zero: -2i If -2i is a zero, so is +2i. Use long polynomial division to calculate x^4-32x^2-144 : (x+2i)(x-2i) But you should calculate (x+2i)(x-2i) first. After that you are able to find the other zeros, -6 and +6 Rapha