Practice problem
Is the expression below purely real or purely imaginary? (9+5−3+12−18+8)i(9 + 5 - 3 + 12 - 18 + 8)i(9+5−3+12−18+8)i
Yes; purely real
Yes; purely imaginary
No; it's a complex number
No; not enough information
Type a concept, like “slope” or “photosynthesis”.
