a+2a= 8b-b= y+9y= x+7x-4x=ax2a= 8ax2a= 10a-3a= 10a-a=
a+2a= 8b-b= y+9y= x+7x-4x=
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy
1.已知集合A={(x,y)|y=2x+1},B={(x,y)|y=x+3},a∈A,b∈B,求a
define A(x,y) x*y-x/y main(){int a=5,b=2,y;y=A(a+b,a-b);prin
已知集合A={(x,y)|(y-3)/(x-2)=a+1}B={(x,y)|(a^2-1)x+(a-1)y=15},当a
单项式A,B满足等式2x(A-3x)=4x的平方y+B,求A,B
X=a*b*c,Y=a*b*c,[X,Y]=( ),(x.y)=( ).
已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a
已知a,b,x,y属于正实数,a+b=10,a/x+b/y=1,(x+y)min=18,求a,b 急
已知x、y、a、b∈R+,a+b=10,且a/x+b/y=1,x+y的最小值为18,求a,b.