Solve for x in the equation x squared minus 12 x plus 36 is equal to 90
A
x is equal to 6 plus or minus 2 square root of 7B
x is equal to 12 plus or minus 3 square root of 10C
x is equal to 12 plus or minus 3 square root of 22D
x is equal to 6 plus or minus 3 square root of 10