1.已知△ABC的三边a,b,c满足a²+b²+c²-ab-bc-ac=0,试判断△ABC的形状.2.已知:a,b满足a²+2b²-2ab-1=0,求a+2b的值.3.已知2x²-x²-13x+k能在有理数范围内分解因式,且有一个因式为2x+1,求
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/19 10:41:00
xYIoG+} bWsT&9 ͜h+Z(bKlɋlR2n~B18hanO*lEkM9z[vZIg3=N8kjY[EVl~f!ArKS}yT٩0;^g??nlvvrӗCCHԊEo}9x&ݕW2qivgc-'o[XtL(Nu}Uw+{uZ5ėCI=&7F;6"9}l|w gެUZ?7qwh>sKS=KM,.pU'y 2k
Gp:G榳l,$mHA|-[j9hh0$5\ǧ%?~&e x 'C
;s4'og A}/Vö]bY uܬ-ZY_uW>?V)PݝF:%AyPHa FTLvv NHގGtŝcz"&tnL0+U)
e6!ĹO&\)WsqPeH̀Пzn`BgeJWF.xqY_fwae\|