If 3x + 4y = 18 and xy = 6, find the value of 9x2 + 16y2.
A 180
B 144
C 324
D 170
L
L
If 3x + 4y = 18 and xy = 6, find the value of 9x2 + 16y2.
A 180
B 144
C 324
D 170