Question

if 3 is solution of 3x2+(k-1)x+9=0 find k​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

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x = 3 (given)

Putting values in the given polynomial

3 (3)^2 + ( k - 1 ) 3 + 9 = 0

27 + 3k - 3 + 9 = 0

27 -3 + 9 + 3k = 0

33 + 3k = 0

3k = -33

k = -33/3 = -11

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