Question

Solve by completing the square. x2−12x=−27 Select each correct answer. −9 −3 3 9 15

Answer 1

x=9,3

Explanation:

x²-12x=-27

x²-12x+(12/2)²=-27+(12/2)²

x²-12x+6²=-27+36

(x-6)²=9

x-6=
`( + )/( - ) √(9)`

x-6=+3 and x-6=-3

x=9 and 3