10道 多谢
第1个回答 2013-01-15
1. ①103×104; ②a·a3; ③a·a3·a5; ④(m+n)2·(m+n)3. 2. ①(103)5; ②(b3)4; ③(-4)3·(-41)3. ④ (-3x)4 3.① (2b)3; ② (2a3)2; ③ (-a)3; ④-3x3y·2x2y2 4.①(-2a3b2)3 ② 2(-x²y) 5 ; ③(-m5)4(-m2)3 ④ 3x2y·(-2xy3); 5.①2a2(3a2-5b) ②(-2a2)(3ab2-5ab3) ③(5x+2y)(3x-2y)④(-3x²y)(32xy²) 6.①3x2y·(-2xy3)②(-5a2b3)·(-4b2c)③2a2(3a2-5b)④(-2a2)(3ab2-5ab3). 7.(1)223221515xxxx+−−+−;;;; (2)+−−++214321222xxxx;;;; 8.(1)()()2442432aaaaa−++••; ; ; ; (3) )9(943222aaa−•−− 9.(1)(m-5)(m+3); (3)(2x-3)(2x-4). (4)(x+2y-3)(x-2y+3);(5)(a+b+c)2 10.①(3y+2)(y-4)-3(y-2)(y-3) ②(y+2)(y-2)-(y-1)(y+5)