Question

The factors of ( 1 – 6 z+ 9 z²
  )are
​

Answer 1

Factors are (3z-1)(3z-1)

Answer 2

Answer:

product of 1 and 9=9

factors of 9 that add up to -6= -3 and -3

1-3z-3z+9zsquare

1(1-3z) - 3z(1-3z)

(1-3z)(1-3z)