▲ 4 r/maths

Why does the x turn negative

I understand how to get the vertex, but I don’t understand why it becomes negative because I thought absolute numbers were positive unless theirs a negative sign before the absolute lines but both are negative.

u/Diamond_Branches — 14 days ago

What are these red lights flashing on poles in a field

I assume it has something to do with planes but I have no idea

u/Diamond_Branches — 2 months ago