Mathematics
Senior High
Resolved
どうやったら、この式がこの式に変わるんですか?
26
応用問題
例題2 次の式を因数分解せよ。
(x-1)(x-2)(x+3)(x+4)-84
解答(x-1)(xー2)(x+3)(x+4)-84
=(x-1)(x+3)}{(x-2)(x+4)}-84
=(x*+2x)-3{(x?+ 2x)-8}-84
=(x2+2x)?-11(x+2x)-60
= (x?+2x)-15}{(x?+2.x) +4}
=(x-3(x+5)(x?2+2x+4) 匿
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