neu m,n la cac so tu nhien thoa man
4m^2 + m=5n^2+n thi m - n va 5m+5n+1 deu la so chinh phuong
tim so tu nhien n de 2^8+2^11+2^n la so chinh phuong
tim so tu nhien N co 2 chu so,biet rang 2N+1 va 3N+1 la cac so chinh phuong
neu m, n la cac so tu nhien thoa man 4m\(^2\)+m = 5n\(^2\)+n thi m-n va 5m +5n +1 la so chinh phuong
cho so nguyen to p va cac so duong x,y thoa man 4x^2-3xy-y^2-p(3x+2y)=2p^2 CHUNG MINH RANG 5x-1 la so chinh phuong
Tim p de P=n^2+a7 la so chinh phuong
tim n la so tu nhien sao cho n2+2002 la 1 so chinh phuong
tim x,y nguyen duong de:
x2+3y va y2+3x la so chinh phuong
Tim so nguyen n de
a, n2 -5
b, n2-4n +3
La cac so chinh phuong
