Question

Which of the following are solutions to the equation below?
Check all that apply
x2 + 4x + 4 = 12

Answer 1

Answer:

         C.  2√3 - 2

Step-by-step explanation:

$x^2 + 4x + 4 = 12\\\\x^2+2\cdot x\cdot2+2^2=12\\\\(x+2)^2=12\\\\x+2=-\sqrt{12}\quad\vee\quad x+2=\sqrt{12}\\\\x=-2\sqrt{3}-2\quad\vee\quad x=2\sqrt3-2$