Question

If x=3 then find the value of K from the
equation 3X + (K-1) X+9+0
(A) -11 (B) 11
(C) -13
(D) 13
​

Answer 1

Answer:

(A) -11

Step-by-step explanation:

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

Now,

3×(3)^2+(k-1)×3+9=0

3×9+3k-3+9=0

3k+33=0

3k= -33

k= -11