Mathematics
Senior High
Resolved
模範解答は x²+y²-z²+2xy なんですけど、どっちでもいいですよね??ダメな場合理由を教えてください🙇🏻♀️🙇🏻♀️
36(1)(x++)(x-2)
=(A+2)(A-z)
=A2-22
=(x+y)-22
-X2+29y+g2-2
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