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If a = 6 + 5 , b = 6 5 then 2a2 5 ab + 2b2...
1.
If a = 6 + 5 , b = 6 5 then 2a2 5 ab + 2b2 = ?
A.
38
B.
39
C.
40
D.
41
Answer» C. 40
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