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Which of the following numbers must be added to complete the square in the equation below?

x²+18x= -27


A. 18 B. 9 C. 54 D. 81

Respuesta :

Noah11012
First, take half of the coefficient of 18x then square it.

18 / 2 = 9
9^2 = 81

So, D. 81 is the answer.

Answer:

I’m pretty sure the answer is 54

Step-by-step explanation:

The top answer seemed to only do the first step in the equation but if you take 81 and subtract it by -27, the complete answer equals 54. NEVERMIND!!! after reading the question again, 81 is most likely the correct answer.

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