# Clarify your complex basic!

**Algebra**Level 1

\[\large x^2 + 18x + 90 = 0\]

Find the value(s) of \(x\) satisfying the equation above.

If the answers are of the form \(-ai - b\) and \(ai - b\), with positive \(a\), submit your answer as \(a+b\).

**Clarification**: \(i=\sqrt{-1}\).

**Bonus**: Try to solve it without using the quadratic formula.