计算．(1)(0.25x-)(0.25x+0.25)；(2)(x-2y)(-2y-x)-(3x+4y)(-3x...
问题详情：计算．(1)(0.25x-)(0.25x+0.25)；(2)(x-2y)(-2y-x)-(3x+4y)(-3x+4y)；(3)(2a+b-c-3d)(2a-b-c+3d)；(4)(x-2)(16+x4)(2+x)(4+x2)．【回答】(1)x2-(2)8x2-l2y2(3)(2a-c)2-(b-3d)2(4)x8-256【解析】试题分析：（1）把小数化为分...
问题详情：计算．(1)(0.25x-)(0.25x+0.25)；(2)(x-2y)(-2y-x)-(3x+4y)(-3x+4y)；(3)(2a+b-c-3d)(2a-b-c+3d)；(4)(x-2)(16+x4)(2+x)(4+x2)．【回答】(1)x2-(2)8x2-l2y2(3)(2a-c)2-(b-3d)2(4)x8-256【解析】试题分析：（1）把小数化为分...