x的三次方-9x 16X四次方 6xy的二次方-9x的二次方y-y的三次方的因式分解
人气:450 ℃ 时间:2019-08-18 21:58:48
解答
x^3-9x =x(x^2-9)=x(x+3)(x-3)
16X^4-1=(4x^2+1)(2x+1)(2x-1)
6xy^2-9x^2y-y^3
=-y(9x^2-6xy+y^2)
=-y(3x-y)^2
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