已知.A={(X,Y)|4X+Y=6},B={(X,Y)|3X+2Y=7}求AnB.

已知集合A={y|y=-x2+2x-1},B={y|y=2x+1},AnB＝ 已知：集合A={2,-1,X2-X+1},B={2Y,-4,X+4},且AnB={-1,7},求AuB 已知集合A={(x,y)|2x+3y=6},B={(x,y)|x-2y=-4},求A∩B, 已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值 已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x²（x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 已知集合A={（x,y)| (y-3)/ (x-1)=2,x,y∈R},B={（x,y)| 4x+ay=16,x,y∈ 已知集合A=｛(x,y)|3x-7y=-5},B={(x,y)|2x+9y=40},求A∩B（用列举 已知4x=9y求(1)x+y/y (2)y-x/2x 已知：A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B