Mathematics
Junior High
Resolved
赤線を引いているところの2ってどういう計算をしてなくせばいいんですか?🙇🏻♀️
2 (2x− y)(x+1½-½y)-(x+y)(4x—
問題3
3 (1) 2(2x-y)(x-
2
=(2x―y)(2x+y)-(x+y)(4x-y)
=(4x²-y²)-(4x²+3xy-y²)
=-3xy
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ありがとうございます!!