(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
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![(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x](/uploads/image/z/1260350-62-0.jpg?t=%285%29%28-2x%26%23178%3B%EF%BC%89%C3%97%EF%BC%88-y%EF%BC%89%2B3xy%C3%97%EF%BC%881-3%E5%88%86%E4%B9%8B1x%29%3B%286%29%EF%BC%88-6x%26%23178%3B%EF%BC%89%26%23178%3B%2B%EF%BC%88-3x%29%26%23179%3B%C3%97x)
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
5、原式=2x²y+3xy-x²y=x²y+3xy
6、原式=36^4-27x^4=9x^4