若3x3-x=1 则 x= 8
你写错了吧 如果等号是-号的话
9x4+12x3-3x2-7x-1314
=36+36-6-7x -1314
=66-7x-1314
=66-56-1314
=-1304
你写错了吧 如果等号是+号的话
9x4+12x3-3x2-7x+1314
=36+36-6-7x +1314
=66-7x+1314
=66-56+1314
=1324
若3x3-x=1 则 x= 8
你写错了吧 如果等号是-号的话
9x4+12x3-3x2-7x-1314
=36+36-6-7x -1314
=66-7x-1314
=66-56-1314
=-1304
你写错了吧 如果等号是+号的话
9x4+12x3-3x2-7x+1314
=36+36-6-7x +1314
=66-7x+1314
=66-56+1314
=1324