Question

the value for k for which kx^ 2-4x+4=0 has real and equal roots is
(a)-1 (b)2 (c) -2 (d) 1​

Answer 1

Answer: d. 1

Step-by-step explanation:

since the equation has equal and real roots

therefore, the discriminant of the equation =0

therefore, b^2-4ac=0

b:-4   a:k   C:4

(-4)^2-4*k*4=0

16-16k=0

-16k=-16

k=1

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