If 3 is a solution of 3x ^ 2 + (k – 1) x + 9 = 0 then k = ?

A) -9

B) -11

C) -13

 D) -16

If 3 is a solution of equation, then it should satisfy that equation,

3x2+(k−1)x+9=0

3(32)+(k−1)3 +9=0

27+3k−3+9=0

3k=−33

∴k=−11

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