Question

For what values of K , the quadratic equation 9x^2+6kx+4=0
has equal root?

Answer 1

Answer:

For equal roots

b^2-4ac=0

a=9 b=6k c=4

(6k) ^2-4(9)(4)=0

36k^2-144=0

36k^2=144

k^2=144/36

k^2=4

k=2

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