Question

Find all the zeroes of the polynomial x 4 +x 3 +34x 2 -4x+120. if its two zeroes are 2 and -2

Answer 1

as 2 n -2 are zeroes. hence its factor would be (x-2) (x+2). divide the whole polynomial i.e x4+ x3 ........ to obtain a quadratic eqn. and hence find its other roots .