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一、选择题1.下列根式 ,是最简二次根式的是 ( )( A) 32 ( B) 122( C) ab2 ( D) a+b22 .不是同类二次根式的一组是 ( )( A) 2和 8( B) 13和 3( C) 4x和 x ( D) 2 a和 a3.当 x- 1时 ,化简 ( x+1) 2 =( )。( A) x+1( B) - x- 1( C) - x+1( D) x- 14.方程
First, the multiple-choice questions 1. The following root formula, is the most simple secondary root type is () (A) 32 (B) 122 (C) ab2 (D) a + b22. Not a group of the same secondary root type is () ( A) 2 and 8 (B) 13 and 3 (C) 4x and x (D) 2 a and a3. When x-1, simplify (x+1) 2 = (). (A) x+1(B) - x- 1( C) - x+1( D) x- 14. Equations