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Question

$MF#%(422 + 404)^2 - (4 \times 422 \times 404) = ?$MF#%
Options:
A .  None of these
B .  342
C .  324
D .  312
Answer: Option C

Answer : Option C

Explanation :

$MF#%(a + b)^2 - 4ab = (a^2 + 2ab + b^2) - 4ab = (a^2 - 2ab + b^2) = (a - b)^2$MF#%


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