Find the value of k for which the equation 9x^2+8kx+16 has two equal roots
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B^2-4AC=0
(8k)^2-4(9)(16)=0
64k^2-576=0
64k^2=576
k^2=9
k=3
(8k)^2-4(9)(16)=0
64k^2-576=0
64k^2=576
k^2=9
k=3
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