Mathematics
Senior High
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(2)の因数分解の過程を教えてください!
(2)
3
(x-1)(x+1−a)=0.
(x+α-1=0とすると
x=1
x=1, a-1___ DET(2-0)([−b)=(1−p)h
a-1
,
3-01-b+x
ゆえに
よって, 放物線がx軸から切り取る線分の長さは
< | (a-1)-1|=|α-2|
ゆえに
la-2|=6
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