Find the value of k for which 9x^2+3kx+4=0 has distinct roots
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b^2-4ac=0 If has distinct roots
(3k)^2-4*9*4=0
9k^2-144=0
k^2=16
k=4
(3k)^2-4*9*4=0
9k^2-144=0
k^2=16
k=4
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