fealDebutte fealDebutte

08-11-2016
Mathematics

contestada

What number would you have to add to both sides to complete the square?

x2 + 12x = _6

A.
_36

B.
36

C.
144

D.
_144

Respuesta :

drakearianna97 drakearianna97

08-11-2016

i think the answer is A

Answer Link

Edufirst Edufirst

12-11-2016

x^2 + 12x = -6

x^2 + 12 x + 6^2 = -6 + 6^2

(x + 6)^2 = - 6 + 36

(x +6)^2 = 30

In the first step I had to add 6^2 = 36. The answer is option B. 36.

Answer Link

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