计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².

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计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².计算:2(x+1)²-4(

计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².
计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².

计算:2(x+1)²-4(x+1)(x-1)+3(x-1)².
(1)原式=(x+1)(2x+2-4)=2(x+1)(x-1)=2x^2-2;(2),原式=(x-1)(1+3x-3)(x-1)(3x-2)