Exam ecovery
Find the missing side of this right
triangle.
х
8
16
X =
V[?]
Enter the number that belongs in the green box.

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.