Question

How come when you solve for a quadratic equation you have to assume the number being square rooted is both positive and negative?

Answer 1

Whenever you square a positive or negative number, you end up with a positive value. Therefore when you take the square root of a number, you do not know whether the original value was positive or negative.

Answer 2

Sir, that is very good explanateon

Answer 3

Thanks...I was wondering if it actually made sense :)