1(1)x^2+2x+4
(2)y^2-10y+25
2(1)4x^2-20x+25
(2)x^2+4xy+4y^2
4(1)4a^2+12ab+9b^2
(2)y^2-y+1/4
5(1)x^2-4xy+4y^2
(2)m^2+6mn+9n^2
3(1)4xy
(2)x^2+2xy+y^2-1
6(1)2xy-2y^2
(2)x^2+4xy+4y^2-9
大部分都是直接得出答案的,纯手打,
1(1)x^2+2x+4
(2)y^2-10y+25
2(1)4x^2-20x+25
(2)x^2+4xy+4y^2
4(1)4a^2+12ab+9b^2
(2)y^2-y+1/4
5(1)x^2-4xy+4y^2
(2)m^2+6mn+9n^2
3(1)4xy
(2)x^2+2xy+y^2-1
6(1)2xy-2y^2
(2)x^2+4xy+4y^2-9
大部分都是直接得出答案的,纯手打,