Solve x2 + 12x + 6 = 0 using the completing-the-square method. a) x = negative six plus or minus the square root of thirty b) x = six plus or minus the square root of thirty c) x = negative six plus or minus the square root of six d) x = six plus or minus the square root of six

The correct answer is A

Step-by-step explanation:

The given expression is

Add to both sides

Add to both sides.

We got a perfect square on the left hand side

Simplify the left hand side to get,

Take square root of both sides

Solve for .

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.