因式分解 6at+3bt-2as-bs xy-xz+y-z 3x-6y+ax-2ay 5ax+6by+5ay+6bx -
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6at+3bt-2as-bs

=3t(2a+b) - s(2a+b)

=(2a+b)(3t-s)

xy-xz+y-z

=x(y-z) + (y-z)

=(y-z)(x+1)

3x-6y+ax-2ay

=3(x-2y) + a(x-2y)

=(x-2y)(3+a)

5ax+6by+5ay+6bx

=5a(x+y) + 6b(y+x)

=(x+y)(5a+6b)

-xy+bx+ay-ab

=ay-xy-ab+bx

=y(a-x) - b(a-x)

=(a-x)(y-b)

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