What the answer pre algebra oder operating

Difficult to see problem but if the last sign is a plus sign then the answer is - 1

Step-by-step explanation:

8 - 1 - (18 - 2) + 8

7 - 16 + 8

- 1

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

true? is that what you're asking or do you mean something else?