Question

if one of the zero of quadratic polynomial ( k-1 ) xsquare + ks +1 is -3 then the value of k is

plz fast​

Answer 1

Answer:

k=3/4

(Assuming there is an error in the question and it's kx instead of ks)

Step-by-step explanation:

Since -3 is a root of the equation, therefore x=-3

(k-1)x² + kx + 1 = 0

(k-1)(-3)² + (-3)x + 1 = 0

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

9k - 9 - 3x +1 = 0

6k - 8 = 0

6k = 8

k = 8/6

Therefore, k = 4/3