I remember my teacher saying something about you square root an answer like 121 the answer is -11 and +11
But, this also is not true for all the answers
Could someone tell me when I square root a number, when it is both a + and -, and when it is just a + .
The square root of any number can be either positive or negative.
When you multiply two negative numbers together, the answer is positive.
Yes
When you square root a number, such as 121, it is important to understand the concept of positive and negative square roots. The square root of a number is a value that, when multiplied by itself, gives the original number. In the case of 121, the square root is indeed both -11 and +11.
Let's break down the scenarios:
1. Positive Square Roots: When you square root a positive number, like 121, you will always get both a positive and a negative root. This is because when you square a negative number, it becomes positive. In this case, the square root of 121 is +11 and -11. Both +11 and -11, when multiplied by themselves, equal 121.
2. Negative Square Roots: When you square root a negative number, there is no real-valued answer. In terms of real numbers, the square root operation is defined only for non-negative numbers. So, for any negative number, like -121, there is no real square root.
To summarize, positive numbers will have both positive and negative square roots, while negative numbers do not have real square roots.