Question

Solve the equation below by completing the square.
x? + 8x = -11

Answer 1

`x { }^(2) + 8x + 11 = 0 \\ d = 64 - 44 = 20 \\ x1 = ( - 8 - √(20) )/(2) = - 4 - √(5) \\ x2 = ( - 8 + √(20) )/(2) = - 4 + √(5)`