Mathematics
Senior High
(2)の途中式が分からないので教えて欲しいです。
答えは(a+bーc)(ab+bcーca)
次の式を因数分解せよ.
(1) bc(b-c)-ca(c+a)+ab(a+b)
(2) a'(b-c)+6°(c+a)+c*(aーb)-abc
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