(1)解方程: 2 x x - 2 = 3 x - 2 + 1 ;
(2)解不等式: 4 ( x - 1 ) - 1 2 < x
计算 (1)()×(-36); (2)-22×(-)+8÷(-2)2 (3).
计算:
计算:(a>0).
计算:.
化简: (1)(x+3y)2-2(x+3y)(x-3y)+(x-3y)2 (2).