Answer:
A
Step-by-step explanation:
Noting that i² = - 1
Given
(7 - 3i)(8 + 4i) ← expand factors using FOIL
= 56 + 28i - 24i - 12i²
= 56 + 4i - 12(- 1)
= 56 + 4i + 12
= 68 + 4i → A
They are never perpendicular. They will be parallel and will never meet!
Lol you like maths? Honestly, I don't like it much b r u h
4x + 10x = 14x
And 5x + 3x is an example of having like terms.