计算﹙x+y﹚²﹙x-y﹚²+﹙2x-y﹚²﹙2x+y﹚²
问题描述:
计算﹙x+y﹚²﹙x-y﹚²+﹙2x-y﹚²﹙2x+y﹚²
答
﹙x+y﹚²﹙x-y﹚²+﹙2x-y﹚²﹙2x+y﹚²=(x²-y²)²+(4x²-y²)²=x⁴-2x²y²+y⁴+16x⁴-8x²y²+y⁴=17x⁴-10x²...
计算﹙x+y﹚²﹙x-y﹚²+﹙2x-y﹚²﹙2x+y﹚²
﹙x+y﹚²﹙x-y﹚²+﹙2x-y﹚²﹙2x+y﹚²=(x²-y²)²+(4x²-y²)²=x⁴-2x²y²+y⁴+16x⁴-8x²y²+y⁴=17x⁴-10x²...