- #1
Numbnut247
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hey guys on my textbook, it says that square root of 4 equals to 2 but not negative 2. The book is wrong right?
But I think it's the part where (-2)^2 = 4 bothers him. Taking the square root of both sides...Tide said:Numbnut,
We have to take your word that the textbook said "square root" but I suspect it says [itex]\sqrt 4 = 2[/itex] (a true statement) while [tex]\sqrt 4 = -2[/tex] is definitely a false statement. However, there are, two real numbers whose squares are 4 ([itex]\sqrt 4 = 2[/itex] and [itex]-\sqrt 4 = -2[/itex]).
Numbnut247 said:hey guys on my textbook, it says that square root of 4 equals to 2 but not negative 2. The book is wrong right?
The square root of 4 is 2.
No, the square root of 4 is a well-known mathematical concept and cannot be deemed as wrong.
Yes, there are two square roots of 4: 2 and -2. However, the most commonly accepted answer is just 2.
To calculate the square root of 4, you can use a calculator or manually take the square root of 4 by finding the number that, when multiplied by itself, equals 4.
The square root of 4 is significant because it is one of the simplest and most commonly used square roots in mathematics. It is also a crucial concept in geometry and algebra, as it is the basis for finding the length of a side in a perfect square shape.