计算:
(1) ( − 2 ) 2 × | − 3 | − ( 6 ) 0
(2) ( x + 1 ) 2 − ( x 2 − x )
计算: (1) (2).
计算:2sin30°+cos45°﹣tan60°.
(1)计算:2﹣1+cos45°﹣()2+(2﹣tan45°)0; (2)解方程:2x2﹣x﹣3=0.
(1)解方程:(3x﹣11)(x﹣2)=2 (2)计算:(﹣1)2﹣(﹣)(+).
计算: (1)cos30°﹣()﹣1+20140﹣|﹣1| (2)(2﹣)2013(2+)2014+2×+(﹣)0.