解方程(1)(2x+1)2=3(2x+1);(2)x2-7x+10=0.
计算(1)(2)(a+1)2﹣a(a﹣1)
计算:
(11·十堰)计算:-2-1+︱-1︱.
(11·丹东)(本题8分)计算: