Question

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

Answer 1

Answer:

k is -11

Step-by-step explanation:

3x²+(k-1)x+9=0

Put x =3

3(3)² + (k - 1)3 + 9 = 0

3(9) + 3k - 3 + 9 = 0

27 + 3k + 6 = 0

33 + 3k = 0

3k = -33

k = -33/3

k = -11