Question

If 3m + 4n=4 and 3m - 4n=3, find the values of
(i)18m^2 + 32n^2 (ii)97mn (iii)9m^2 - 16n^2

Answer 1

adding both equations,

6m = 7
so m = 7/6

then putting the required value in 1st equation,

7/2 + 4n = 4
4n = 1/2
n = 1/8

then put in the values in questions asked and get the values!

hipe this helps you out......

Answer 2

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