Question

Factor the expression below.
9x^2 - 1

Answer 1

`x=(1)/(3)` or
`x = -(1)/(3)`

Explanation:

`9x^(2) -1 = 0`

`9x^(2) = 1`

`x^(2) = (1)/(9)`

`x = +-\sqrt{ (1)/(9)`

`x=(1)/(3)` or
`x = -(1)/(3)`

Answer 2

x=1/3

Explanation:

9x^2-1=0

Add 1 to both sides

9x^2=1

Divide both sides by 9

x^2=1/9

Square root both sides

x=1/3