Question

1) If x = 5 is a root of equation kr2 - 14x - 5 = 0 then
find the value of k
solution one of the roots of equation kr2 - 14x -5 = 0 is
let x = 5
k( ² - 14 (5) - 5 = 0
.. 25k - 70 - 5 = 0
.. 25k-. = 0
.. 25k =.
. k=. ​

Answer 1

Answer:

⇒ kx² - 14x - 5 = 0

x = 5 is a root of equation

∴ 25k - 70 - 5 = 0

∴ k = 3