胸中有谱,从容应考——致即将一模的同学们最易错tan30=1tan60=33sin60=cos30=32sin30=cos60=12负号1x-1-x+1x-1¡Ù1x-1xx+12-xx2+x-x-7y=-x2+2mx-4m-m2ÓëxÖáÓÐÁ½¸ö½»µã最易错别跳步！x2-4x+4-4+32=0x2-4x+32=0Åä·½·¨2x2-8x+3=0¡...

时间:2024-11-15 08:22栏目:幼儿/小学教育