Mathematics
Senior High
矢印のところは、どうして右辺に「±」がついたのでしょうか？？
(2) 2直線のなす角の2等分線上の任意の点をP(X,Y) とおくと,点
Pから2直線までの距離が等しいから
|3X-4Y| |-5X+12Y|
√3+(-4)2
√(-5)²+122
=
13|3X-4Y|=5|5X-12Y |
13 ( 3X-4Y) = ±5 ( 5X-12Y)
7
y=-x. Y-4x
X,Y
-X
7
4
‥. Y
200
(200
ago+x200+xnie=(x)\
12
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