Question

if the sum of two zeroes of polynomial x^3-ax^2bx-c is zeroes. which is true
1.ab=c
2.a-b=c
3.ab=c/2
4.a=b/c​

Answer 1

Answer:

option 1 is true

Step-by-step explanation:

Let p, q, r be zeroes of the polynomial

Let p+q=0

x³-ax²+bx-c=0

p+q+r=a

0+r=a

r=a

pq+qr+pr=b

pq+r(p+q)=b

pq+r(0)=b

pq=b

pqr=c

(pq)(r)=c

ba=c