1.方程 x2=16 的根是 x1=______,x2=_______.2.若 x2=225,则 x1=_____,x2=_______.3.若 x2-2x=0,则 x1=________,x2=________.4.若(x-2)2=0,则 x1=________,x2=_______.5.若 9x2-25=0,则 x1=________,x2=_______.6.若-2x2+8=0,则 x1=________,x2=________.7.若 x2+4=0,则此方程解...
时间:2025-04-11 21:33栏目:高等教育