来自潘博的问题
(1)6xn+1-14xn+8xn-1(2)(x+1)(x+2)(x+3)(x+4)+1(3)(1-a2)(1-b2)-4ab(4)8a3-b3(5)3x2+5xy-2y2+x+9y-4(6)2x2+xy-y2-4x+5y-6(7)x2+x-(a2-a)
(1)6xn+1-14xn+8xn-1(2)(x+1)(x+2)(x+3)(x+4)+1(3)(1-a2)(1-b2)-4ab(4)8a3-b3(5)3x2+5xy-2y2+x+9y-4(6)2x2+xy-y2-4x+5y-6(7)x2+x-(a2-a)
1回答
2020-09-26 19:18