Question

1 point
Q.39 If 3 is a solution of 3x? + (k - 1)x -9=0,
then k = ?
O 5
O
4
O
-5
O
-4​

Answer 1

Answer:

The correct answer is k=(-5)

Step-by-step explanation:

put the value x=3 in the given quadratic equation

(as it's a solution of it)

3x²+(k-1)x-9=0

3×3² + (k–1)×3 -9=0

(k–1)×3=9-27=–18

k -1=-6

k=-5

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