If x=3 is a solution of the equation3x^2+(k-1)x+9=0 then k=?
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Answer:3x^2+(k-1)x-9=0
Put the value x=3 in this equation
:. 3×(3^2)+(k-1)3=9
:.3×9+3k-3=9
27+3k-3=9
3k=9+3-27
3k=-15
:. K=-15/3
K=-5
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