Mathematics
Senior High
黒丸の答えが何を表すのか教えてください
ax?+bx+c%3D0 (a>0) の解 y=ax?2+ bx+cと x軸交点について
2解が正→ ( D 6°-4ac>0 ) ( 軸x=
ー6
2a
( y切片(c>0
ーb
2解が負 →( D'6"-4ac>0 )( 軸 x=
<0
2a
へ
-
( y切片(c>0
へ
解が異符号 → (
C<0
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