Question

Which of the following is a solution of x2 + 2x = −2?
x = 4 − 3i
x = −4 + 3i
x = −1 + i
x = 1 − i

Answer 1

c

Answer 2

Put it in standard form
ax^2 + bx + c = 0

apply quadratic formula

Answer 3

https://www.wolframalpha.com/input/?i=x2+%2B+2x+%3D+%E2%88%922%3F

Answer 4

you will get a negative root term, where the i comes from, i^2 = -1 or sqrt(-1) = i

Answer 5

Right, @beckyg111 , but you learn nothing with just the answer