Question

if two zeroes of the polynomial x³+3x²-5x-15 , find its third zero ​

Answer 1

Step-by-step explanation:

let the 3 zeroes be a , b and c

A/Q

x = a

> x-a =0

similarly x - b =0

Now multiply x-a and x-b

And then Divide f(x) with the result..

you will get your 3rd root of the polynomial