Question

how to factor -9z^2 + 10z - 1 = 0 it’s been a while since i’ve been in school and i can’t seem to remember how please help

Answer 1

z = 1/9 and z = 1

Explanation:

`-9 z^(2) + 10z - 1 = 0`

`(-9z+1)(z-1) = 0`

You can check the answer using foil method

Then,

`(-9z+1) = 0`

`-9z = -1`

`z = 1/9`

`(z-1) = 0`

`z = 1`

Answers:

`z = 1/9`

`z = 1`