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The square root of a number has two answers. amirite?

Top Comment

no, the square root of a number is always the positive
i.e. if x is the square root of 4, then x is 2.
however, if you state that x squared is 4, then x can be both +/- 2.
so you have to be careful!
my teacher marked me off on a test because of that once

+991 See / Add Replies

Anonymous

Comments

No. Example: the square root of 4 is +/-2

-10212 Reply

a_duck

In response to “No. Example: the square root of 4 is +/-2

exactly, 2 and -2, two different answers

+1212 Reply

Anonymous

But you always forget, and end up with only half the answer to your equation

+55 Reply

Anonymous

no, the square root of a number is always the positive
i.e. if x is the square root of 4, then x is 2.
however, if you state that x squared is 4, then x can be both +/- 2.
so you have to be careful!
my teacher marked me off on a test because of that once

+991 Reply

Anonymous

In response to “no, the square root of a number is always the...

Exactly, it's only when you are trying to solve an equation. If it's just simply: What is the square rooot of 4, then the answer is 2. If it's: X^2=4, then the answer is X = +/-2.

011 Reply

Friday_Night_Lights Friday_Night_Lights

what about -1? or any negative number.
There's just i.

+22 Reply

admiralpants admiralpants

In response to “what about -1? or any negative...

you forgot -i

+11 Reply

Anonymous

In response to “you forgot -i

WELL PLAYED.

+11 Reply

admiralpants admiralpants

negative numbers don't have square roots

-55 Reply

Anonymous

In response to “negative numbers don't have square roots

u can actually square root a negative number...by using complex numbers. what do u people learn in school? seriously.

0 Reply

Anonymous

and plus there are no two real numbers that when mutiplied equal a negative number

-11 Reply

Anonymous

and plus there are no two real numbers that when mutiplied equal a negative number

-11 Reply

Anonymous

In response to “and plus there are no two real numbers that...

exactly, there is no square root of a negative number :D

-11 Reply

Birthdaycake

In response to “exactly, there is no square root of a...

no REAL square root.

+11 Reply

Anonymous

In response to “no REAL square root.

It doesnt SAY REAL

+121 Reply

Birthdaycake

In response to “and plus there are no two real numbers that...

Two real numbers when multiplied that equal a negative number? -3 x 2 = -6...
Or am I not understanding your comment? Sorry if I'm not

011 Reply

betofourtwenty

What about zero? There ya go.

-22 Reply

shaanarora shaanarora

Since when is this an opinion?

+22 Reply

Anonymous

it's summer. can we please not talk about this?

+55 Reply

Anonymous

The square root of a number only represents the positive number. x^2=4 has 2 answers: +/-2. But the square root of 4 is only 2.

+11 Reply

dodobird

WHY ARE WE TALKING ABOUT MATH ON THE INTERNET DURING SUMMER?

JUST WONDERING.

0 Reply

Anonymous

In response to “WHY ARE WE TALKING ABOUT MATH ON THE INTERNET...

It's not summer everywhere, idiot. And some people enjoy maths.

Also, I think you might have bumped your caps lock key.

+11 Reply

Anonymous

square root of any positive number has two answers, like square root of 4 is 2 and -2, as -2X-2=4 and 2X2=4
for negative integers you have to use imaginary numbers, the square root of -4 is 2i and -2i. but you only need to start worrying about square rooting negative numbers if you are continuing maths to a higher level than just year 11 and GCSE's

0 Reply

Math<3

^^^^ bunch of nerds haha just sayin...

-11 Reply

Heyheyhey(:

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