Mathematics
Senior High
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なぜ〰️の式になるのか分かりません💧
誰か教えてください!!
(2) 与式={(a+bXa+c){(b+c)+ abc={a°+(b+c)a+bc{(b+c)+ abc
=(b±c)+位+dla+belb±0+abc(6+c)a'+116+cfocla+bclb+c)
={a+(b+c){(6+c)a+bc}=(a+b+cXab+bc+ca)
1×
b+c
b+c
bc
bc
be(b+c)
(6+c)°+bc
b+C
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