Question

If roots of equation 2x^2+8x-m are equal then value of m

Answer 1

ROOTS ARE EQUAL SO FROM THE DISCRIMINANT FORMULA

D=B^2-4AC. WHERE D=0,A=2,B=8,C=-m.
0=64-4(2)(-m)
0 =64+8m
0=64+8m
-64=8m
m=8