(2007•闸北区二模)因式分解:x2-y2-2x+1=______.
因式分解:(x2+2x+1)-y2=______.
(2014•闸北区一模)由曲线x2+y2=|x|+|y|所围成的图形面积为______.
(2005•闸北区二模)二次函数y=x2-4x+1图象的对称轴是直线______.
因式分解:1-x2+4xy-4y2=______.
(2009•闸北区二模)方程sinπx2=13x−1
(2005•闸北区一模)方程x2+2x=12的正实数根x≈______(结果精确到0.1).
因式分解(x2+2x+1)-y2
(2013•闸北区二模)(1+2x)3(1-x)4展开式中x6的系数为______.
已知实数x、y满足(x2+y2)(x2+y2-1)=2,则x2+y2的值为______.
将下列式子因式分解:x-x2-y+y2=______.
因式分解:9x2-y2-4y-4=______.
因式分解:-3x2+6xy-3y2=______.