Mathematics
Senior High
Resolved
P(1/2)=0のときなぜ(2x-1)が因数になるのですか?
(x -1/2)とは違うのですか?
32-
124 (1) P(x)=2x'+x + x1 とすると
P(12)=2(2)+(1/2)+/12-1=0
よって, P(x)は2x1
x2+x+1
を因数にもつ。
2x-1) 2x²+x'+x-1
右の割り算から
P(x)
=(2x-1)(x2+x+1)
2
2x2+x
2x²-x
2x-1
2x-1
0
2
f
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