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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:

from ,
Class :

Ans 2:

from ,
Class :
answer is 24 square=576

Ans 3:

from ,
Class :
answer is 24 square=576

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