Mathematics
Senior High
なぜcはこのように変形できるのですか？
12:50
×
y=ax2+bx+c
b
= a(x2+-x)
al(x-
b
•a{(x+:
2a 4a2
2a
b²
(~~(~~)-
2a
4a
b2-4ac
4a
+
+c
2a
4a
+c
b2-4ac
4a
2a
b62-4ac)
4G 864
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