a²-ac-4b²+2bc
=-c(a-2b)+a²-4b² ←-cで括る
=-c(a-2b)+(a+2b)(a-2b)
=(a-2b)(a+2b-c) ←a-2bで括る
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions 😉
a²-ac-4b²+2bc
=-c(a-2b)+a²-4b² ←-cで括る
=-c(a-2b)+(a+2b)(a-2b)
=(a-2b)(a+2b-c) ←a-2bで括る
Users viewing this question
are also looking at these questions 😉
基本的に次数が低い文字でくくるとできます