Question

The equation ax2

+ 2x + a = 0 has two equal roots, if

A) a = 4

B) a = 0

C) a = 2

D) a = 1​

Answer 1

Step-by-step explanation:

a=4 ........ ...........

Answer 2

Answer:

a=1

Step-by-step explanation:

we know that

for two equal roots determinant(D)=0

b^2-4ac=0

b^2=4ac put values

4=4a^2

a^2=1

a=+1 or -1

but according to options a=1 is answer