Mathematics
Senior High
2次関数のところで、(4)のグラフの形は(3)のようになるはずなのですが、どこか間違っているんでしょうか?教えてください🙏
(3) y=-3x²+6x+1
-3(x²-2x)+1
-3(x-13-3-(-1)}+1
-3 (x-1)^2+4
3 14
1
頂点(14)
軸x=1
11:2
2
(4) y = -x² - 4x +2
- (x²+4x) +2
-{(x + 2)²3.2} +2
= -(x + 2)² - 4
y
2
-4
-2
頂点(-2,-4)
軸x=-2
上に凸
x
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