Question

Which of the following is a solution of x2 + 4x = −8?

Answer 1

`x^(2)+4x = -8 \\\\ x^(2)+4x+8 = 0 \\\\ \Delta = b^(2)-4ac \\\\ \Delta = (4)^(2)-4 \cdot (1) \cdot (8) \\\\ \Delta = 16-32 \\\\ \Delta = -16`

There's no solution in the set of real numbers.


`\boxed{S = \{ \ \ \}}`