Question

Solve x2 + 4x + 8 = 0.

Answers are

x equals negative 2 plus or minus 2 I
x equals negative 2 plus or minus 4 I
x equals negative 4 plus or minus 2 I
x equals negative 4 plus or minus 4 I

Answer 1

x^2 + 4x + 8 = 0
( x + 2 ) ( x + 2 ) = 0

i am a mathematics teacher. if anything to ask please pm me