Mathematics
Senior High
Resolved
なぜ2(x+y)が出てくるのでしょうか
(7) 4x=(3(x+y)-z]{(x+y) + z)
=3(x+y)2+2x+y)z-z²
=3x²+6xy+3y²+22x+2yz-z 2
=3x²+3y²-z2+6xy+2yz+2zx
(3x+3y-z)(x+y+z)
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions 😉

ありがとうございます。