x²-4xy+4y²-6x+12y+9因式分解算到(x-2y)的平方-6(x-2y)+9之后怎么算?
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![x²-4xy+4y²-6x+12y+9因式分解算到(x-2y)的平方-6(x-2y)+9之后怎么算?](/uploads/image/z/2099051-35-1.jpg?t=x%26%23178%3B-4xy%2B4y%26%23178%3B-6x%2B12y%2B9%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%AE%97%E5%88%B0%28x-2y%29%E7%9A%84%E5%B9%B3%E6%96%B9-6%28x-2y%29%2B9%E4%B9%8B%E5%90%8E%E6%80%8E%E4%B9%88%E7%AE%97%3F)
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x²-4xy+4y²-6x+12y+9因式分解算到(x-2y)的平方-6(x-2y)+9之后怎么算?
x²-4xy+4y²-6x+12y+9因式分解
算到(x-2y)的平方-6(x-2y)+9之后怎么算?
x²-4xy+4y²-6x+12y+9因式分解算到(x-2y)的平方-6(x-2y)+9之后怎么算?
用十字交叉法:
x-2y -3
x-2y -3
十字交叉,就能得到原式=(x-2y-3)^2