It factors into (x-3)(x+3) as it follows the difference of squares rule. However, since you gave me an expression and not an equation, I cannot solve this expression beyond this point. If x^2-9=0. Then you can see that (x-3)=0 and (x+3)=0. Thus x=-3, 3.
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81 x 2 - 16 = 146
x-7
The value of x is 7
(x−6)(x+5)
x + 1