Question

kx^2-x-1=0. then k=? x =1​

Answer 1

kx² - x - 1 = 0

If x = 1

kx² - x - 1 = 0

k (1)² - 1 -1 = 0

k - 2 = 0

k = 2

Answer 2

$k {x}^{2} - x - 1 = 0 \\ k( {1})^{2} - 1 - 1 = 0 \\ k - 2 = 0 \\ k = 2$

Hope it helps you....