Question

If the sum of the zeroes of the polynomial f(x) = 2x cube - 3kx +4x -5 is 6 then the value of k is?

Answer 1

Answer:

K=4

Step-by-step explanation:

comparing this with standard form of equation,

a= 2

b=(-3 k)

c=4

d=(-5)

A.T.Q.

$\alpha+\beta+\gamma=6\\\alpha+\beta+\gamma=\frac{-b}{a}\\=> \alpha+\beta+\gamma=6=\frac{-b}{a}\\=> \frac{-(-3k)}{2}=6\\=>3k=12\\=>k=\frac{12}{3}\\=>k=4$

$Learning\;\;together\;:)$

Answer 2

Answer:

K=4

Step-by-step explanation:

b

$\alpha + \beta + \gamma = 6 \\ \\ also \alpha + \beta + \gamma = - b \div a \\ \\ so6 = - ( - 3k) \div2 \\ \\ \\ \\ k = 4$