Mathematics
Senior High
Solved
→の部分の式の変換の仕方が何故こうなるのかがわかりません。
(4) (x+1)(x+2)(x+3)(x+4)-24 (a-c
{(x+1)(x+4)}{(x+2)(x+3)}-24
=
=(x+5x+4)(r2+5 +6)–24
=(r2+5r)2+10(r+5r)
=(r+5r)(r+5r+10)
=x(x+5)(x+5 +10)
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ありがとうございます!