先化简再求值(x+3)(x-3)-6(x-6)其中x=2

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先化简再求值(x+3)(x-3)-6(x-6)其中x=2先化简再求值(x+3)(x-3)-6(x-6)其中x=2先化简再求值(x+3)(x-3)-6(x-6)其中x=2(x+3)(x-3)-6(x-6

先化简再求值(x+3)(x-3)-6(x-6)其中x=2
先化简再求值(x+3)(x-3)-6(x-6)其中x=2

先化简再求值(x+3)(x-3)-6(x-6)其中x=2
(x+3)(x-3)-6(x-6)
=x²-9-6x+36
=x²-6x+27
=4-12+27
=19

(x+3)(x-3)-6(x-6)
=x^2-9-6x+36
=x^2-6x+27
=4-12+27
=19