Question

If the roots of 2x square -6x+k=0 are real and equal, find k

Answer 1

a=2. b=-6. c=k

if roots are equal then,

D=0

b^2-4ac=0

(-6)^2-4×2×k=0

36-8k=0

36=8k

36/8=k

18/4=k

9/2=k

4.5=k

hope it helps....