Evaluate Imaginary Solutions of Simple Quadratic Equations. Solve the equation by completing the square. 5x^2 - 4 = - 8

Question

Evaluate Imaginary Solutions of Simple Quadratic Equations. Solve the equation by completing the square. 5x^2 - 4 = - 8

Answer 1

5x^2 - 4 = -8

5x ^2= -8 + 4 = -4

x ^2 = -4/5

x^2 = square root of -4/5

x = +2isqr(0.2)

x = about +.9i or - .9i

(completing the square is a little redundant or trivial. x^2 = -4/5 is already in a square form)