①(3x²y³)²÷(1/3xy²)²-7xy²②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²③-2014×2010④1999²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 03:33:02
![①(3x²y³)²÷(1/3xy²)²-7xy²②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²③-2014×2010④1999²](/uploads/image/z/1049122-10-2.jpg?t=%E2%91%A0%283x%26%23178%3By%26%23179%3B%29%26%23178%3B%C3%B7%281%2F3xy%26%23178%3B%29%26%23178%3B-7xy%26%23178%3B%E2%91%A1%281%2F2-%CF%80%2F3%29%5E0%2B%281%2F2%29%26%23179%3B%C3%97%28-8%29%2B2013%26%23178%3B-2014%26%23178%3B%E2%91%A2-2014%C3%972010%E2%91%A31999%26%23178%3B)
①(3x²y³)²÷(1/3xy²)²-7xy²②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²③-2014×2010④1999²
①(3x²y³)²÷(1/3xy²)²-7xy²
②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²
③-2014×2010
④1999²
①(3x²y³)²÷(1/3xy²)²-7xy²②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²③-2014×2010④1999²
1.27x4y6*9x2y4-7xy2=243x6y10-7xy2
2.1+(-1)+(2013-2014)(2013+2014)=-4027
3.-(2012+2)(2012-2)=-2012²+4=-(2000+12)²+4=-4000000-48000-144+4=-4048140
4.(2000-1)²=4000000-4000+1=3996001
1题=X²Y²-7XY²
2题=1+1/8X(-8)+(2013+2014)(2013X2014)=1-1+(4027)X(-1)=-4027
3题=-(2012+2)(2012-2)=-(2012²-2X2)=-4048140
4题=(2000-1)²=2000²-2x2000x1-1=4000000-4000+1=3996001
①(3x²y³)²÷(1/3xy²)²-7xy²
=﹙3x²y³÷1/3xy²﹚²-7xy²
=﹙9xy﹚²-7xy²
=81x²y²-7xy²
=xy²﹙81x-7﹚
②(1/2-π/3)...
全部展开
①(3x²y³)²÷(1/3xy²)²-7xy²
=﹙3x²y³÷1/3xy²﹚²-7xy²
=﹙9xy﹚²-7xy²
=81x²y²-7xy²
=xy²﹙81x-7﹚
②(1/2-π/3)^0+(1/2)³×(-8)+2013²-2014²
=1+1/8×(-8)+﹙2013+2014﹚﹙2013-2014﹚
=1-1-4027
=4027
③-2014×2010
=-﹙2012+2﹚﹙2012-2﹚
=-﹙2012²-2²﹚
=-﹙4048144-4﹚
=-4048140
④1999²=﹙2000-1)²=2000²-2x2000x1+1=4000000-4000+1=3996001
收起