Question

if the sum of zeros of a given polynomial f(x)=x³-3kx²-x-30 find the value of k​

Answer 1

Answer:

Step-by-step explanation:

f( x ) = x³ -3kx² - x + 30

compare f ( x ) with ax³ + bx² + cx + d ,

a = 1 , b = -3k , c = -1 , d = 30

we know that ,

sum of the zeroes = - b/a

but according to the problem given ,

-b/a = 6

- ( -3k ) / 1 = 6

3k = 6

k = 6/3

k = 2