把抛物线y=5x2先向左平移3个单位,再向下平移2个单位后,所得抛物线的解析式是( )
A:y=5(x+3)2 -2
B:y=5(x+3)2+2
C:y=5(x-3)2 -2
D:y=5(x-3)2+2
-- Oh, new bike is over there? It's so nice!
-- Maybe it's Mary's. She bought one yesterday.
如图,△ABD是等腰三角形,AB=AD,将△ABD沿BD翻折得△CBD,点P是线段BD上一点,