1.(x-2y+3)(x-2y+4)
2.(x+a)(x+b)
3.(y-z)(2x-3)(3x+4)
4.(6x+6y+1)(x+y-1)
5.(4x²y²-7)(2x²y²+5)
6.(x+y+1)(x+y-2)
7.(x³-13x+12)(x+2)
8.(x-1)(x-a)
9.(2x-1)(5x+8)
10.m=-1 n=-0.5
11.a=1,b=-4或a=-4,b=1
1.(x-2y+3)(x-2y+4)
2.(x+a)(x+b)
3.(y-z)(2x-3)(3x+4)
4.(6x+6y+1)(x+y-1)
5.(4x²y²-7)(2x²y²+5)
6.(x+y+1)(x+y-2)
7.(x³-13x+12)(x+2)
8.(x-1)(x-a)
9.(2x-1)(5x+8)
10.m=-1 n=-0.5
11.a=1,b=-4或a=-4,b=1