Subject :IMO Class : Class 8
If 3x – 7y = 10 and xy = – 1, then the value of 9x2 + 49y2 is ____.
A 58
B 142
C 104
D – 104
If 3x – 7y = 10 and xy = – 1, then the value of 9x2 + 49y2 is ____.
A 58
B 142
C 104
D – 104