Question: When completing the square on x^2+16x=5 what is the quantity that must be added to both sides of the equation in order for the left

When completing the square on x^2+16x=5 what is the quantity that must be added to both sides of the equation in order for the left side to factor into a perfect square?

a. 16

b. 64

c. 256

d. 8

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