Mathematics
Senior High
数1の平方完成です。
囲っている-1の2乗はどこから来たんですか？
(2) 3x²-6x+5 を平方完成する。
3x²-6x+5=3(x²-2x)+5
12
=3{(x-1)²-1}}+5
3
=3(x-1)²-3.1+5
=3(x-1)²+2
[— (S+
1
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