计算:( 1 2 ) ﹣ 1﹣2sin45°+|﹣ 2 |+(2018﹣π) 0.
计算:
计算; (1) (2)(-)2007×1.52008×(-1)2008
(1)解方程:x2+3x-2=0;(2)解不等式组:
计算: (1)-2-(-)0+2sin60°-|-3|; (2)(x+1)2-(x+2)(x-2)
计算:.