✨ Best Answer ✨
a＋b＝4 より両辺を2乗して
(a＋b)²＝4²
a²＋2ab＋b²＝16
a²＋b²＝16－2ab
ここで、ab＝－2 より
a²＋b²＝16＋4＝20
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✨ Best Answer ✨
a＋b＝4 より両辺を2乗して
(a＋b)²＝4²
a²＋2ab＋b²＝16
a²＋b²＝16－2ab
ここで、ab＝－2 より
a²＋b²＝16＋4＝20
Users viewing this question
are also looking at these questions 😉
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