✨ Best Answer ✨
A^2−B^2=(A+B)(A-B)を利用して、
81^2−19^2=(81+19)(81-19)=100×62=6200
だと思います。
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✨ Best Answer ✨
A^2−B^2=(A+B)(A-B)を利用して、
81^2−19^2=(81+19)(81-19)=100×62=6200
だと思います。
Users viewing this question
are also looking at these questions 😉
ご解答ありがとうございます。