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sergeinik [125]
3 years ago
11

What number must you add to complete the square x^2+12x =16

Mathematics
1 answer:
Nookie1986 [14]3 years ago
8 0

Answer:

D. 36

Step-by-step explanation:

The square of half the x-coefficient must be added. That value is (12/2)² = 36.

_____

You're trying to create a trinomial of the form ...

... (a + b)² = a² +2ab +b²

where a = x, and 2b = 12.

The number you need to add is b² = (2b/2)² = (12/2)² = 36.

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