1.(x^2-2y)(xy^2)^2= 2.(3x-2)(3-5x)的展开式中,二次项系数为(),一次项系数为3.8x^6-6x^6+12x^5+6x^4 4.(x+2)(y-3)-(x-1)(y+2) 5.(a-6)(a^2+b^2)(a+b) 6.(x+2y)^2(x-2y)^2 7.(a-2b+3c)(a-2b-3c)
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![1.(x^2-2y)(xy^2)^2= 2.(3x-2)(3-5x)的展开式中,二次项系数为(),一次项系数为3.8x^6-6x^6+12x^5+6x^4 4.(x+2)(y-3)-(x-1)(y+2) 5.(a-6)(a^2+b^2)(a+b) 6.(x+2y)^2(x-2y)^2 7.(a-2b+3c)(a-2b-3c)](/uploads/image/z/2095234-34-4.jpg?t=1.%28x%5E2-2y%EF%BC%89%EF%BC%88xy%5E2%29%5E2%3D+2.%EF%BC%883x-2%EF%BC%89%EF%BC%883-5x%29%E7%9A%84%E5%B1%95%E5%BC%80%E5%BC%8F%E4%B8%AD%2C%E4%BA%8C%E6%AC%A1%E9%A1%B9%E7%B3%BB%E6%95%B0%E4%B8%BA%EF%BC%88%EF%BC%89%2C%E4%B8%80%E6%AC%A1%E9%A1%B9%E7%B3%BB%E6%95%B0%E4%B8%BA3.8x%5E6-6x%5E6%2B12x%5E5%2B6x%5E4+4.%28x%2B2%29%28y-3%29-%28x-1%29%28y%2B2%29+5.%28a-6%29%28a%5E2%2Bb%5E2%29%28a%2Bb%29+6.%28x%2B2y%29%5E2%28x-2y%29%5E2+7.%28a-2b%2B3c%29%28a-2b-3c%29)
1.(x^2-2y)(xy^2)^2= 2.(3x-2)(3-5x)的展开式中,二次项系数为(),一次项系数为3.8x^6-6x^6+12x^5+6x^4 4.(x+2)(y-3)-(x-1)(y+2) 5.(a-6)(a^2+b^2)(a+b) 6.(x+2y)^2(x-2y)^2 7.(a-2b+3c)(a-2b-3c)
1.(x^2-2y)(xy^2)^2= 2.(3x-2)(3-5x)的展开式中,二次项系数为(),一次项系数为
3.8x^6-6x^6+12x^5+6x^4 4.(x+2)(y-3)-(x-1)(y+2) 5.(a-6)(a^2+b^2)(a+b) 6.(x+2y)^2(x-2y)^2 7.(a-2b+3c)(a-2b-3c)
1.(x^2-2y)(xy^2)^2= 2.(3x-2)(3-5x)的展开式中,二次项系数为(),一次项系数为3.8x^6-6x^6+12x^5+6x^4 4.(x+2)(y-3)-(x-1)(y+2) 5.(a-6)(a^2+b^2)(a+b) 6.(x+2y)^2(x-2y)^2 7.(a-2b+3c)(a-2b-3c)
1、.(x^2-2y)(xy^2)^2=、.(x^2-2y)(x³y^4)=x^5y^4-2y^5,的展开式中,二次项系数为(0),一次项系数为 (0)
.2、(3x-2)(3-5x)=9x²-5X-6的展开式中,二次项系数为(9),一次项系数为 (-5)
3.8x^6-6x^6+12x^5+6x^4=2x^6+12x^5+6x^4的展开式中,二次项系数为(0),一次项系数为 (0)
4.(x+2)(y-3)-(x-1)(y+2)
= .xy-3X+2y-6-xy-2X+y+2
= .-5X+3y-4的展开式中,二次项系数为(0),一次项系数为 (-5和3)
5.(a-6)(a^2+b^2)(a+b)
=( .a³+ab²-6a²-6b^2)(a+b)
= .a^4+a²b²-6a³-6ab^2+6a³b+ab³-6a²b-6b³的展开式中,二次项系数为(0),一次项系数为 (0)
6.(x+2y)^2(x-2y)^2
= .x^4-4x³y+4x²y²+4x³y-16x²y²+16xy³+4x²y²-16xy³+16y^4
= x^4-8x²y²+16y^4的展开式中,二次项系数为(0),一次项系数为 (0)
7.(a-2b+3c)(a-2b-3c)
=.[(a-2b)+3c][(a-2b)-3c]
=(a-2b)²-(3c)²
=a²-4ab+4b²-9c²的展开式中,二次项系数为(1,-4,4,-9),一次项系数为 (0)
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