Question

find the value of 'm' x^2-4x+(m-4)=0 has equal roots.......please answer it ....please

Answer 1

Answer:

8

Step-by-step explanation:

Equal roots

x^2-4x+(m-4)=0

let the roots be a,a

sum of the roots=-coefficient of x/coefficient of x^2

a+a=4/1

So a=2

Means roots are 2,2

product of roots =constant term /coefficient of x^2

a×a=(m-4)/1

4=(m-4)

m=8