I.4x2=49 II.9y2−66y+121=0
if x < y
if x y
if x = y
if x > y
4x2=49
x2=494
x=±72=±3.5
9y2−66y+121=0
(3y−11)2=0
y=113=3.66
x < y
I. 4x2 = 49 II. 9y2 - 66y + 121 = 0
I.9x2−18+5=0
II.2y−9y+10=0
I.x2+9x+14=0
II.y2+y−2=0
I.x2+x−20=0 II.y2−y−30=0