[질문] ㄴㄴ아닌데

a제곱+b제곱+c제곱을구할때사용하는곱셈공식은(a＋b)(a2－ab＋b2)=a3＋b3//(a－b)(a2＋ab＋b2)=a3－b3//(a＋b)3=a3＋3a2b＋3ab2＋b3//(a－b)3=a3-3a2b＋3ab2-b3