Mathematics
Senior High
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(1) と(3)の途中式を知りたいです!

229 a°(b-c)+6°(c-a)+c°(a-b) (2) ab(a+b)+bc(b+c)+ca(c+a)+2abc *3 ab(a+b)+bc(b+c)+ca(c+a)+3abc
因数分解

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