计算下列题
(3x^2-xy^2)×3xy=()2.(4ab-b^2)×(-2bc)=()3.2X×(x^2-1/2x+1)=()4.5ab×(2a-b+0.2)=()5.(-3x^...
(3x^2-xy^2)×3xy=( )
2. (4ab-b^2)×(-2bc)=( )
3. 2X × (x^2-1/2x+1)=( )
4. 5ab × (2a-b+0.2)=( )
5.(-3x^2) × (4x^2-4/9x+1)=( )
6.(2a^2-2/3a-4/9) × (-9a)=( )
7. (-2ab^2)^2 × (3a^2 b-2ab-4b^3)=( )
8. (3/4x^2 y-1/2xy^2-5/6y^3)× (-4xy^2)= ( ) 展开
2. (4ab-b^2)×(-2bc)=( )
3. 2X × (x^2-1/2x+1)=( )
4. 5ab × (2a-b+0.2)=( )
5.(-3x^2) × (4x^2-4/9x+1)=( )
6.(2a^2-2/3a-4/9) × (-9a)=( )
7. (-2ab^2)^2 × (3a^2 b-2ab-4b^3)=( )
8. (3/4x^2 y-1/2xy^2-5/6y^3)× (-4xy^2)= ( ) 展开
1个回答
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1.(3x^2-xy^2)×3xy=( 9x³y-3x²y³ )
2. (4ab-b^2)×(-2bc)=( -8ab²c+2b³c )
3. 2X × (x^2-1/2x+1)=( 2x³-x²+2x )
4. 5ab × (2a-b+0.2)=( 10a²b-5ab²+ab )
5.(-3x^2) × (4x^2-4/9x+1)=( -12x^4+4x³/3-3x² )
6.(2a^2-2/3a-4/9) × (-9a)=(-18a³+6a²+4a )
7. (-2ab^2)^2 × (3a^2 b-2ab-4b^3)=( 12a^4b^5-8a³b^5-16a²b^7 )
8. (3/4x^2 y-1/2xy^2-5/6y^3)× (-4xy^2)= (-3x³y²+2x²y^4+10xy^5/3 )
2. (4ab-b^2)×(-2bc)=( -8ab²c+2b³c )
3. 2X × (x^2-1/2x+1)=( 2x³-x²+2x )
4. 5ab × (2a-b+0.2)=( 10a²b-5ab²+ab )
5.(-3x^2) × (4x^2-4/9x+1)=( -12x^4+4x³/3-3x² )
6.(2a^2-2/3a-4/9) × (-9a)=(-18a³+6a²+4a )
7. (-2ab^2)^2 × (3a^2 b-2ab-4b^3)=( 12a^4b^5-8a³b^5-16a²b^7 )
8. (3/4x^2 y-1/2xy^2-5/6y^3)× (-4xy^2)= (-3x³y²+2x²y^4+10xy^5/3 )
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