If are two zeroes of the polynomial , then its third zero is
(a) 3
(b) -3
(c) 5
(d) -5
Answers
Answered by
1
SOLUTION :
The correct option is (b) : - 3 .
Let α = √5 , β = - √5 and γ are the three Zeroes of the cubic polynomial.
Given : The cubic polynomial f(x) = x³ + 3x² - 5x - 15
On comparing with ax³ + bx² + cx + d
a = 1, b= 3, c = - 5 , d = - 15
Sum of zeroes of cubic polynomial= −coefficient of x² / coefficient of x³
α + β + γ = −b/a
√5 +(- √5) + γ = −3/1
√5 - √5 + γ = −3
γ = −3
Hence, the third zero (γ) is − 3 .
HOPE THIS ANSWER WILL HELP YOU..
Answered by
0
Answer: x = -3
Solution:
if
are the zeros of given polynomial,than
are the factors of polynomial,on multiply or on applying identity
now divide the polynomial by this
so third factor is
third zero is
Solution:
if
are the zeros of given polynomial,than
are the factors of polynomial,on multiply or on applying identity
now divide the polynomial by this
so third factor is
third zero is
Similar questions