Question

if one of the zeroes of the quadratic polynomial (k-1)x^2-5x+4, so that 3 is the zero of the polynomial.

Answer 1

(k-1)(3)^2-5(3)+4

(k-1)(9)-15+4=0

(k-1)(9)-15=-4

(k-1)(9)=-4+15

(k-1)(9)=11

9k-9=11

9k = 11+9

9k= 20

k=20/9