Subject :IMO Class : Class 7
The value of 9x2 + 49y2 - 42xy when x = 15 and y = 3 is ______.
(A) 636
(B) 576
(C) 386
(D) 456
Ans 1:
Class : Class 8
answer is 24 square=576
Ans 2:
Class : Class 8
answer is 24 square=576
Ans 3:
Class : Class 7