(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b=?
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![(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b=?](/uploads/image/z/3815354-2-4.jpg?t=%28-a%26%23178%3B%29%C2%B7a%26%23179%3B%C2%B7%28-2a%29%26%23179%3B%2B%28-2ab%29%26%23178%3B%C2%B7%28-a%29%26%23179%3B%C2%B7b%3D%3F)
(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b=?
(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b=?
(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b=?
(-a²)·a³·(-2a)³+(-2ab)²·(-a)³·b
=2a的8次方-4a²b²*a³*b
=2a的8次方-4a的5次方b³
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