
计算题啊!
(x+1)²(x-1)²(-a-3)²(1/2a+2b)²(2/3m-1/4b)²(xy-1)²...
(x+1)²
(x-1)²
(-a-3)²
(1/2a+2b)²
(2/3m-1/4b)²
(xy-1)² 展开
(x-1)²
(-a-3)²
(1/2a+2b)²
(2/3m-1/4b)²
(xy-1)² 展开
2个回答
展开全部
(x+1)²=x²+2x+1
(x-1)²=x²-2x+1
(-a-3)²=a²+6a+9
(1/2a+2b)²=1/4a²+2ab+4b²
(2/3m-1/4b)²=4/9m²-1/3bm+1/16b²
(xy-1)²=x²y²-2xy+1
(x-1)²=x²-2x+1
(-a-3)²=a²+6a+9
(1/2a+2b)²=1/4a²+2ab+4b²
(2/3m-1/4b)²=4/9m²-1/3bm+1/16b²
(xy-1)²=x²y²-2xy+1
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