以知a=3x² b=-2xy² c=-x²y求【a+b】【ac】的值 【a-b²】【b+c】的值
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![以知a=3x² b=-2xy² c=-x²y求【a+b】【ac】的值 【a-b²】【b+c】的值](/uploads/image/z/1786125-21-5.jpg?t=%E4%BB%A5%E7%9F%A5a%3D3x%26%23178%3B+b%3D-2xy%26%23178%3B+c%3D-x%26%23178%3By%E6%B1%82%E3%80%90a%2Bb%E3%80%91%E3%80%90ac%E3%80%91%E7%9A%84%E5%80%BC+%E3%80%90a-b%26%23178%3B%E3%80%91%E3%80%90b%2Bc%E3%80%91%E7%9A%84%E5%80%BC)
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以知a=3x² b=-2xy² c=-x²y求【a+b】【ac】的值 【a-b²】【b+c】的值
以知a=3x² b=-2xy² c=-x²y求
【a+b】【ac】的值 【a-b²】【b+c】的值
以知a=3x² b=-2xy² c=-x²y求【a+b】【ac】的值 【a-b²】【b+c】的值
以知a=3x² b=-2xy² c=-x²y求
【a+b】【ac】的值
=(3x²-2xy²)(3x²×(-x²y))
=-9x^6y+6x^5y^3;
【a-b²】【b+c】的值 谢谢
=(3x^2-4x^2y^4)(-2xy^2-x^2y)
=-6x^3y^2-3x^4y+8x^3y^6+4x^4y^5;
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a+b
=3x²+(-2xy²)
=3x²-2xy²
ac
=(3x²)(-x²y)
=-3x的4次方y
a-b²
=3x²-(-2xy²)²
=3x²-4x²y的4次方
b+c
=(-2xy...
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a+b
=3x²+(-2xy²)
=3x²-2xy²
ac
=(3x²)(-x²y)
=-3x的4次方y
a-b²
=3x²-(-2xy²)²
=3x²-4x²y的4次方
b+c
=(-2xy²)+(-x²y)
=-2xy²-x²y
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