16x2+25y2=40016 x^{2}+25 y^{2}=40016x2+25y2=400
9x2+25y2=2259 x^{2}+25 y^{2}=2259x2+25y2=225
25x2+9y2=22525 x^{2}+9 y^{2}=22525x2+9y2=225
25x2+16y2=40025 x^{2}+16 y^{2}=40025x2+16y2=400
9x2+16y2=1449 x^{2}+16 y^{2}=1449x2+16y2=144