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Q. Find the value(s) of k for which the equation x2 + 5kx + 16 = 0 has real and equalroots.

Answer»

x^2+5kx+16= 0for equal roots= D= 0b^2= 4ac(5k)^2= 4x 1625k^2= 64k^2= 64/25k= 8/5



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