Question

QUESTION 4:
Find the values of 'm' so that the equation
(m-4)x² + 2(m-4)x +4 =0 has equal roots.​

Answer 1

Answer:

as the equation has equal roots so,

b^2-4ac=0

here b=2(m-4)

a=(m-4)

c=4

so,

(m-4)^2-4.(m-4).4=0

=> (m-4)^2=16(m-4)

=> m-4=16

=> m=16+4=20

the value of m is 20