x^2/a^2 - y^2/b^2 = 1.参数a,b 分别是图形中的什么

通分 a/(y-x)^2,b/(x-y)(x+y) 因式分解a(x-y)+b(y-x)+(2x-y) (x+y)(a-2b) 若集合A={(x,y)|y>=|x-2|} ,B={(x,y)|y A={（x,y)|y>=0.5|x-2|},B={(x,y)|y 已知a,b,X,Y属于R+,求证a^2/X+b^2/Y>=(a+b)^2/(X+Y) 已知：A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B 已知实数a,b,x,y,满足不等式（a+b）(x+y)>2(ay+bx),求证（x-y）/(a-b)+(a-b)/(x-y)>=2 抛物线y=2-(x-a)(x-b)(a 初一因式分解练习题,谁好心帮我解下表示平方1.2X~-3XY-X2.(X+Y)~(X+Y)(X-Y)(X+Y)(Y+Z)3.3X(a+2b)~-6XY(a+2b)4.a(x-y)-b(X-Y)-C(Y-X)5.(b-a)~-2a+2b6.(x-y)~-m(y-x)+y-x7.x(x-y)(a-b)-y(y-x)(b-a)8.已知a+b=13,ab=40,求 b+ab~的值 A={(X,Y)|X+Y>=1},B={(X,y)|X^2+y^2=1},B={(X,y)|X^2+y^2 填空：(b-a)(2x-y+1)=(a-b)( ) A:{(x,y)|y=x方+2x},B:{(x,y)|y=x+a},A交B的真子集为空集,求a的范围 a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式 已知x+y=a,x-y=b.求:x^2+y^2;xy x+y=a,x-y=b.求2x-3y等于 4a(x-y)二次方-2b(y-x)二次方+(y-x)= 已知A=2x+y,B=2x-y,计算A^2-B^2