2516
2564
58
54
Correct answer is A
4x2 + 5x + Q
To make a complete square, the coefficient of x2 must be 1
= x2 + 5x4 + Q4
Then (half the coefficient of x2) should be added
i.e. x2 + 5x4 + 2564
∴ Q4 = 2564
Q = 4×2564
= 2516
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