Question

if 1/2 is a root of the quadratic equation x to the power 2 + lx -5/4 then the valve of k​

Answer 1

Answer:

k=2

Step-by-step explanation:

given 1/2 is a root of the equation

x²+kx-5/4=0

so

(1/2)²+k(1/2)-5/4=0

1/4+k/2=5/4

k/2=5/4-1/4

k/2=4/4

k/2=1

k=2