计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
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计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^4-16x³y^5)÷4x²y³
解
6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^4-16x³y^5)÷4x²y³
=12x³y³÷(-3x²y)-(4x²y³)(3x²y³-2y-4xy²)÷4x²y³
=-4xy²-(3x²y³-2y-4xy²)
=-4xy²+4xy²-3x²y³+2y
=2y-3x²y³
再问: 神速啊!膜拜了!请点↓ http://zhidao.baidu.com/question/1859816722387407347.html?quesup2&oldq=1
再答: 有人回答了
再问: 你再验算一遍好不好!!学霸!!!
再答: ①(3x²y³)²÷(1/3xy²)²-7xy² =(9x^4y^6)÷(1/9x²y^4)-7xy² =81x²y²-7xy² 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) =4-2012² =-4048140 ④1999² =(2000-1)² =2000²-2×2000+1 =4000000-4000+1 =3996001 ③题实在想不出有什么好的方法
6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^4-16x³y^5)÷4x²y³
=12x³y³÷(-3x²y)-(4x²y³)(3x²y³-2y-4xy²)÷4x²y³
=-4xy²-(3x²y³-2y-4xy²)
=-4xy²+4xy²-3x²y³+2y
=2y-3x²y³
再问: 神速啊!膜拜了!请点↓ http://zhidao.baidu.com/question/1859816722387407347.html?quesup2&oldq=1
再答: 有人回答了
再问: 你再验算一遍好不好!!学霸!!!
再答: ①(3x²y³)²÷(1/3xy²)²-7xy² =(9x^4y^6)÷(1/9x²y^4)-7xy² =81x²y²-7xy² 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) =4-2012² =-4048140 ④1999² =(2000-1)² =2000²-2×2000+1 =4000000-4000+1 =3996001 ③题实在想不出有什么好的方法
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