This document provides step-by-step work to factor the expression 1x^2 - 9. It begins with the expression, multiplies -9 to both sides, then factors -9 into 3*3. This leads to factoring the entire expression as (x-3)(x+3), showing the two factors that multiply to the original expression.

1. x2 – 9 (hint: b=0)

2. 1x2 - 9
Multiply
-9

3. 1x2 - 9
-9
Factor
1 9
3 3

4. 1x2 + 0x - 9
Factors must combine to 0
-9
Factor
1 9
3 3

5. 1x2 - 9 -9
Factor
1 9
3 3

6. 1x2 - 9
(x )(x )
-9
Factor
1 9
+3 -3

7. 1x2 - 9
(x )(x )+ 3 - 3