Question

If 3 is a solution of the equation 3 x square + k - 1 x + 9 equal to zero then k equal to

Answer 1

3(X)2 + k - 1x +9 =0

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

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

27 + k -3 + 9 =0

27 + k + 6 =0

33 + k = 0

k = 0 -33

k = -33

Hope it helps !!!