Question

find all the zeroes of the polynomial x^4-3x^3-15x^2+19x+30 if 2 of its zeroes are 2 and -3

Answer 1

Answer:

as it is a biquadratic expression it has 4 roots.

divide the expression by (x-2)(x+3).

you'll get a quadratic expression.

find it's roots. you'll thus get all the roots