Answers

それぞれの式をx-yとxyで表せばよい
(1)なら
x^2+y^2=(x+y)^2-4xy

tra7345

符号ミス
x^2+y^2=(x-y)^2+4xy

Post A Comment
Were you able to resolve your confusion?

Users viewing this question
are also looking at these questions 😉