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If 3 is the root of the equation $x^{2}-8 x+k=0$, then what is the val ue of $k$ ?
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Since, 3 is the root of the equation $x^{2}-8 x+k=0$ 3 satisfies the equation $x^{2}-8 x+k=0$ $9-24+k=0 \Rightarrow k=1 \mathrm{k}$
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