\(xy=\dfrac{\left(x+y\right)^2-x^2-y^2}{2}=\dfrac{p^2-q}{2}\)
\(x^3+y^3=\left(x+y\right)^3-3xy\left(x+y\right)\)
\(=p^3-3\cdot\dfrac{p^2-q}{2}\cdot p\)
Tim cac so nguyen x,y thoa man: \(x^3+2x^2+3x+2=y^3\)
Tim cac cap so (x,y) duong thoa man (x-y)^3=(x-y-6)^2
cho x,y la cac so nguyen duong thoa man \(9y\left(y-x\right)=4x^2tinhA=\frac{x-y}{x+y}\)
cho cac so thuc x,y thoa man 1/x^2+4+1/y^2+4=2/xy+4.Tinh gia triP=1/x^2y^2+4+4/xy+4
cho cac so thu cx,y thoa man 4/x^2+5/y^2 >=9 tim GTNN cua bt
Q=2x^2+6/x^2+3y^2+8/y^2
Tim cac so nguyen x y thoa man\(x^3+3x=x^2y+2y+5\)
biet x,y,m,n la cac so nguyen thoa man: x+y=m+n. chung minh S=x^2+y^2+m^2+n^2 luon =bang cac binh phuong cua 3 so nguyen
cho x ,y là cac s số duong thoa man dieu kien 9y(y-x)=4x2
tinh gia tri bieu thuc A=\(\frac{x-y}{x+y}\)
giúp mình với ! ai xong truoc minh like cho nha ! Cần gấp , thứ 2 nộp vở !
tim tat ca cac so nguyen x,y thoa man x^3+x^2+2-2y=xy
cho cac so thuc x,y thoa man x^2+y^2-xy-9 tim GTNN cua P= x^2+y^2
help meeeeeeee
