Answers
Answers
a^2+b^2-bc+ca-2ab
次数が最も低いcについて整理すると
=(a-b)c+a^2-2ab-b^2
=(a-b)c+(a-b)^2
=(a-b)(c+a-b)
=(a-b)(a-b+c)
Were you able to resolve your confusion?
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