Clearnote

Study Talk
Q&A
Notebooks
subjects
Tutoring Schools
  1. Clearnote
  2. Q&A
  3. Junior High
  4. Mathematics
  5. やり方を教えてください🙇‍♀️
Mathematics
Junior High
美羽
美羽

やり方を教えてください🙇‍♀️

(x-2y+1)(x+2y-1)
置き換えを使った計算
Clearnote - What Can You Do・How to Use

Answers

BaSO4
BaSO4

2y-1をAとおくと
(x-(2y-1))(x+(2y-1))
=(x-A)(x+A)
=x^2-A^2
=x^2-(2y-1)^2
=x^2-(4y^2-4y+1)
=x^2-4y^2+4y-1

Post A Comment
Were you able to resolve your confusion?

Users viewing this question
are also looking at these questions 😉