因式分解 (1)-15a³b²+9a²b²-3ab³详细过程(1)-15a³b²+9a²b²-3ab³(2)3x²+6xy+3y²(3)(x-1)*(x-2)-2(2-X)²(4)81(a+b)²-16(a-b)²
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![因式分解 (1)-15a³b²+9a²b²-3ab³详细过程(1)-15a³b²+9a²b²-3ab³(2)3x²+6xy+3y²(3)(x-1)*(x-2)-2(2-X)²(4)81(a+b)²-16(a-b)²](/uploads/image/z/7134720-24-0.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+%EF%BC%881%EF%BC%89-15a%26%23179%3Bb%26%23178%3B%2B9a%26%23178%3Bb%26%23178%3B-3ab%26%23179%3B%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%EF%BC%881%EF%BC%89-15a%26%23179%3Bb%26%23178%3B%2B9a%26%23178%3Bb%26%23178%3B-3ab%26%23179%3B%EF%BC%882%EF%BC%893x%26%23178%3B%2B6xy%2B3y%26%23178%3B%EF%BC%883%EF%BC%89%EF%BC%88x-1%EF%BC%89%2A%EF%BC%88x-2%29-2%282-X%EF%BC%89%26%23178%3B%EF%BC%884%EF%BC%8981%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B-16%EF%BC%88a-b%EF%BC%89%26%23178%3B)
因式分解 (1)-15a³b²+9a²b²-3ab³详细过程(1)-15a³b²+9a²b²-3ab³(2)3x²+6xy+3y²(3)(x-1)*(x-2)-2(2-X)²(4)81(a+b)²-16(a-b)²
因式分解 (1)-15a³b²+9a²b²-3ab³详细过程
(1)-15a³b²+9a²b²-3ab³
(2)3x²+6xy+3y²
(3)(x-1)*(x-2)-2(2-X)²
(4)81(a+b)²-16(a-b)²
因式分解 (1)-15a³b²+9a²b²-3ab³详细过程(1)-15a³b²+9a²b²-3ab³(2)3x²+6xy+3y²(3)(x-1)*(x-2)-2(2-X)²(4)81(a+b)²-16(a-b)²
1)-15a³b²+9a²b²-3ab³
=-3ab²(5a²-3a+b)
(2)3x²+6xy+3y²
=3(x+y)²
(3)(x-1)*(x-2)-2(2-X)²
=(x²-3x+2)-2(x²-4x+4)
=-x²+5x-6
=(2-x)(x+3)
(4)81(a+b)²-16(a-b)²
=[9(a+b)+4(a-b)]*[9(a+b)-4(a-b)]
=(13a+5b)(5a+13b)