计算(2x-2)(3x +2)(1)(2x-2)(3x +2)(2)(x+5)²-(x-5)²

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计算(2x-2)(3x +2)(1)(2x-2)(3x +2)(2)(x+5)²-(x-5)²

计算(2x-2)(3x +2)(1)(2x-2)(3x +2)(2)(x+5)²-(x-5)²
计算(2x-2)(3x +2)
(1)(2x-2)(3x +2)
(2)(x+5)²-(x-5)²

计算(2x-2)(3x +2)(1)(2x-2)(3x +2)(2)(x+5)²-(x-5)²
(1)(2x-2)(3x +2)
=6x²+4x-6x-4
=6x²-2x-4
(2)(x+5)²-(x-5)²
=(x²+10x+25)-(x²-10x+25)
=x²+10x+25-x²+10x-25
=20x