Question

NEED HELP ASAP

Solve this quadratic equation by completing the square.
x2 + 4x = 15
O A. X=-4 + 119
O B. *=-4 1/15
O c. x=-2119
O D. X=-27 15

Answer 1

The answer is D.

Explanation:

(X+2)²=19

Answer 2

Explanation:

to solve quadratic equation when the roots are not rational

x = -b+-√(b^2-4*a*c)/ 2a

here a = 1

b = 4

c = -15

(-4+-√16+65)/2

-4+-√81/2

(-4+-9)/2

x = -13/2, 5/2