✨ Best Answer ✨
x+y=Aとおく
(与式)
=(A+2)(A-3)+4
=A²-A-6+4
=A²-A-2
=(A-2)(A+1)
=(x+y-2)(x+y+1)
(1)の解き方が分かりません
どんな公式を使えばいいですか?
✨ Best Answer ✨
x+y=Aとおく
(与式)
=(A+2)(A-3)+4
=A²-A-6+4
=A²-A-2
=(A-2)(A+1)
=(x+y-2)(x+y+1)
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