1-25^2 0.25^2-0.01^2 25x^2+10x+1 -0.25b^2+16a^4 -x^2-4y^2+4x
已知集合A={(x,y)| (y-3)/ (x-1)=2,x,y∈R},B={(x,y)| 4x+ay=16,x,y∈
因式分解 1)9x^4-25y^6 2)4x^2+(x+y)^2+4x(x+y) 3)(a+2b)^2-4ab-13b^
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
分解因式1.(a-b)x^2+9(b-a) 2.(x-y)(x-y+2)+1 3.x^2+2x-8 4.(x^2+4)^
1) -x^4+x^2 y^2 2) 3[(a+b)^2-9c^2] 3) 16(x+y)^2-25(x-y)^2 因式
已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a
1、A={(x,y)|y=x平方-4x=5},B={(x,y)|y=2x平方-7},求A交B
因式分解(x+2)(x-2)+164(x+y)^2-20(x+y)+25a^2-b^2-4a+4b下面计算(2+1)(2
已知集合A={x|(x-2)*(x+1)>0},B={x|4x+a
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy