If 3 is a root of x2+kx-24=0, it is also a root of

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x2+5x+k=0

x2-5x+k=0

x2-kx+6=0

x2+kx+24=0

answer is .

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Detailed Solution

Equation x2+kx-24=0 has one root is 3⇒32-3k-24=0⇒k=5Put x=3 and k=5 in options, only option (3) gives the correct answer.

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