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Question

Find the values of k for which th efollowing equations have real roots.
(i)2x2+kx+3=0(ii)kx(x2)+6=0(iii)x24kx+k=0(iv)kx(x25)+10=0(v)kx(x3)+9=0(vi)4x2+kx+3=0

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Solution

(i)k=±26(ii)k=6(iii)k=0,14(iv)k=2(v)k=4(vi)k=±43


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