Question

Use the Quadratic Formula to solve the equation x2 + 4x = - 11

A. x= 2+i√7 or x= 2-i√7

B. x = -2+i√7 or x = -2-i√7

C. x= 2+√15 or x= 2-√15

D. x= -2+√15 or x= -2-√15

Answer 1

Explanation:

For equation-x²4x+11

x=-b+_√b²-4ac/2a

 = -4+-√16-44/2

 =-2+-√-7

 =-2+-√7i

hence correct option is