(1)计算:2﹣1+cos45°﹣()2+(2﹣tan45°)0;(2)解方程:2x2﹣x﹣3=0.
3x(x-1)=2-2x
+|-2|++(-1)2011
计算:(共24分每题4分) (1)(2)[-2 2+(-2)3 ]-(-2)×(-3) (3)()() (4) (5)—14+〔1-(1-0.5×2)〕÷ (6)[(-3)2-22-(-5)2]××(-2)4
(本大题共4分)计算;