1) (a+b)2 = a) a2+b2+ab b) a2+2ab+b c) a2+b2+2ab d) a2-2ab+b2 2) (a-b)2 = a) a2+b2+2ab b) -a2-b2+2ab c) a2+b2-2ab d) a2-b2-2ab 3) (a+b)(a-b) = a) a2+b2 b) -a2+b2 c) a2-b2 d) a2+b 4) a3+b3 = a) (a+b)(a2+ab+b2) b) (a+b)(a2-ab+b2) c) (a+b)(a2-b2) d) (a+b)(a2-ab-b2) 5) a3-b3 a) (a+b)(a2+ab+b2) b) (a-b)(a2-ab+b2) c) (a+b)2(a-b) d) (a-b)(a2+ab+b2) 6) (a+b)3 a) a3+3a2b+3ab2+b3 b) a3+b3+3a3b3 c) a3+3a2b2+b3 d) a3+3ab+b3 7) (a-b)3 a) a3-3a2b-3ab2+b3 b) a3+3a2b-3ab2-b3 c) a3-3a2b-3ab2-b3 d) a3-3a2b+3ab2-b3 8) (a+b+c)2 a) a2+2ab+b2+c2 b) a2+b2+c2+ab+bc+ca c) a+b+c+2ab+2bc+2ca d) a2+b2+c2+2ab+2bc+2ca 9) (a+b-c)2 a) a2+b2-c2+2ab-2bc-2ca b) a2+b2+c2+2ab-2bc-2ca c) a2+b2-c2+2ab+2bc+2ca d) a2+2ab+b2+c2 10) (-a+b+c)2 a) a2+2ab+b2+c2-2ca b) -a2+b2+c2+2ab-2bc+2ca c) a2+b2+c2-2ab+2bc-2ca d) -a2+b2+c2+2ab+2bc+2ca 11) (a-b+c)2 a) a2-b2+c2+2ab-2bc+2ca b) a2+2ab+b2+c2 c) a2+b2+c2+2ab+2bc-2ca d) a2+b2+c2-2ab-2bc+2ca 12) a0 (a≠0) =   a) a b) 0 c) 1 d) Not define 13) a1 = a) 1 b) a c) 0 d) undefine 14) am☓an = a) am☓n b) am-n c) am+n d) am/n 15) am➗an a) am➗n b) am+n c) amn d) am-n 16) (am)n a) am☓n b) am☓n c) (an)m d) both b and c

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