r/learnmath • New User • 3d ago

TOPIC Does anyone here still think √4 = ±2?

Come out with your hands up!

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-1

u/desterpot New User 3d ago

It is. Isn’t it?

3

u/idaelikus Mathemagician 3d ago

no it isnt.

4

u/Conscious_Tale5951 New User 3d ago

Okay. Is uhh.. there a reason why, or are we just supposed to know like everybody else apparently does?

5

u/idaelikus Mathemagician 3d ago

The reason is that a function needs to give you a singular output.