Question

if one root of the quadratic equation kx^2-3x-1=0 is 1/2, then find the value of k.

Answer 1

Step-by-step explanation:

x=1/2

k/4-3/2-1=0

k/4=3/2+1

k=4*5/2

k=10

Answer 2

Answer:

10

Step-by-step explanation:

As one root of the equation is 1/2 , if we put  1/2 instead of x it will satisfy the equation.

here,

kx²- 3x - 1 = 0

or, k(1/2)² - 3*1/2 - 1 = 0

or, k/4 = 1 + 3/2 = 5/2

or, k = 4* 5/2 = 5* 2 = 10