Mathematics
Junior High
この3段目の答えなんですけどこれはどこをくくりだしているんですか？教えてください🙇♂️
(2) -y= (x+y) (x-y)
=(2+\3 +2-\3) {2+\3-(2-J3)}
=4(2+\3 -2+3)
=4×2、3
=8.3
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