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Factor polynomial x^2-9

An expression to simplify:

The solution

You have entered [src]
 2    
x  - 9
$$x^{2} - 9$$
x^2 - 9
Factorization [src]
(x + 3)*(x - 3)
$$\left(x - 3\right) \left(x + 3\right)$$
(x + 3)*(x - 3)
Numerical answer [src]
-9.0 + x^2
-9.0 + x^2
Combinatorics [src]
(-3 + x)*(3 + x)
$$\left(x - 3\right) \left(x + 3\right)$$
(-3 + x)*(3 + x)