2m^3-4m^2+2m 因式分解若x+y=0,xy=-7,则x^2y+xy^2= ,x^2+y^2=已知a+b=2,ab=2,则2分之1a^3b+a^2b^2+2分之1ab^3=已知a+b=-5,ab=7,则a^2b+ab^2-a-b=化简:(-2)^2n+1+2(-2)^2n
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![2m^3-4m^2+2m 因式分解若x+y=0,xy=-7,则x^2y+xy^2= ,x^2+y^2=已知a+b=2,ab=2,则2分之1a^3b+a^2b^2+2分之1ab^3=已知a+b=-5,ab=7,则a^2b+ab^2-a-b=化简:(-2)^2n+1+2(-2)^2n](/uploads/image/z/2481480-0-0.jpg?t=2m%5E3-4m%5E2%2B2m+%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%8B%A5x%2By%3D0%2Cxy%3D-7%2C%E5%88%99x%5E2y%2Bxy%5E2%3D++++%2Cx%5E2%2By%5E2%3D%E5%B7%B2%E7%9F%A5a%2Bb%3D2%2Cab%3D2%2C%E5%88%992%E5%88%86%E4%B9%8B1a%5E3b%2Ba%5E2b%5E2%2B2%E5%88%86%E4%B9%8B1ab%5E3%3D%E5%B7%B2%E7%9F%A5a%2Bb%3D-5%2Cab%3D7%2C%E5%88%99a%5E2b%2Bab%5E2-a-b%3D%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%88-2%EF%BC%89%5E2n%2B1%2B2%EF%BC%88-2%EF%BC%89%5E2n)
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2m^3-4m^2+2m 因式分解若x+y=0,xy=-7,则x^2y+xy^2= ,x^2+y^2=已知a+b=2,ab=2,则2分之1a^3b+a^2b^2+2分之1ab^3=已知a+b=-5,ab=7,则a^2b+ab^2-a-b=化简:(-2)^2n+1+2(-2)^2n
2m^3-4m^2+2m 因式分解
若x+y=0,xy=-7,则x^2y+xy^2= ,x^2+y^2=
已知a+b=2,ab=2,则2分之1a^3b+a^2b^2+2分之1ab^3=
已知a+b=-5,ab=7,则a^2b+ab^2-a-b=
化简:(-2)^2n+1+2(-2)^2n
2m^3-4m^2+2m 因式分解若x+y=0,xy=-7,则x^2y+xy^2= ,x^2+y^2=已知a+b=2,ab=2,则2分之1a^3b+a^2b^2+2分之1ab^3=已知a+b=-5,ab=7,则a^2b+ab^2-a-b=化简:(-2)^2n+1+2(-2)^2n
若x+y=0,xy=-7,则
x^2y+xy^2
=xy(x+y)=0 ,
x^2+y^2=(x+y)²-2xy
=14
已知a+b=2,ab=2,则
2分之1a^3b+a^2b^2+2分之1ab^3
=1/2ab(a²+2ab+b²)
=1/2ab(a+b)²
=1/2*2*2²
=4
已知a+b=-5,ab=7,则
a^2b+ab^2-a-b
=ab(a+b)-(a+b)
=-35+5
=-30
(-2)^2n+1+2(-2)^2n
=-2^(2n+1)+2*2^2n
=-2^(2n+1)+2^(2n+1)
=0
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