6ab-2b(a-c) 如题,

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6ab-2b(a-c)如题,6ab-2b(a-c)如题,6ab-2b(a-c)如题,原式=6ab-2b(a-c)=6ab-2ab+2bc=4ab+2bc=2b(2a+c)6ab-2b(a-c)=6ab

6ab-2b(a-c) 如题,
6ab-2b(a-c)
如题,

6ab-2b(a-c) 如题,
原式=6ab-2b(a-c)
=6ab-2ab+2bc
=4ab+2bc
=2b(2a+c)

6ab-2b(a-c)
=6ab-2ab+2bc
=4ab+2bc
=2b(2a+c)