求解答 3(x²+2)-3(x+1)(x-1)

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求解答3(x²+2)-3(x+1)(x-1)求解答3(x²+2)-3(x+1)(x-1)求解答3(x²+2)-3(x+1)(x-1)3(x²+2)-3(x+1)

求解答 3(x²+2)-3(x+1)(x-1)
求解答 3(x²+2)-3(x+1)(x-1)

求解答 3(x²+2)-3(x+1)(x-1)
3(x²+2)-3(x+1)(x-1)
=(3x²+6)-3(x²-1)
=3x²+6-3x²+3
=9