化简代数式(x-3)(x+3)-(x-1)(x+1)

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化简代数式(x-3)(x+3)-(x-1)(x+1)

化简代数式(x-3)(x+3)-(x-1)(x+1)
化简代数式(x-3)(x+3)-(x-1)(x+1)

化简代数式(x-3)(x+3)-(x-1)(x+1)
(x-3)(x+3)-(x-1)(x+1)
=x^2-9-(x^2-1)
=x^2-9-x^2+1
=-8

(x-3)(x+3)-(x-1)(x+1)
=x²-9-x²+1
=-8