Subject :IMO Class : Class 7
If l = – 1 and m = 2, then the value of 4l2 + 9m2 + 2lm – 9l2 m is ______.
A 39
B 24
C 18
D 36
If l = – 1 and m = 2, then the value of 4l2 + 9m2 + 2lm – 9l2 m is ______.
A 39
B 24
C 18
D 36