因式分解x的平方-4xy+4Y的平方-3X+6
人气:256 ℃ 时间:2019-11-11 18:08:54
解答
x" - 4xy + 4y" - 3x + 6y
= x" - 2(x)(2y) + (2y)" - 3x + 6y
= (x - 2y)" - 3(x - 2y)
= (x - 2y)(x - 2y - 3)后面没有Yx" - 4x + 4 - 3x + 6= (x - 2)" - 3(x - 2)= (x - 2)(x - 2 - 3)= (x - 2)(x - 5)
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