3/06. Exercise 6.01 Jaa Sulje Kirjaudu sisään lähettääksesi tämän lomakkeen Investigate whether [[$ x = -2 $]] is the solution of the equation. a) [[$ 2x^2 + 5 = 0 $]] Answer: [[$ x = -2 $]] is is not a solution of the equation. b) [[$ x^2 - 2 = 0 $]] Answer: [[$ x = -2 $]] is is not a solution of the equation. c) [[$ -2x^2 - 8 = 0 $]] Answer: [[$ x = -2 $]] is is not a solution of the equation. d) [[$ x^2 - 4 = 0 $]] Answer: [[$ x = -2 $]] is is not a solution of the equation. Kirjaudu sisään lähettääksesi tämän lomakkeen
