The number that, when multiplied by itself, equals 4 is called the square root of 4. Mathematically, this is represented as √4. The square root of 4 is equal to 2, because 2 multiplied by 2 equals 4. Therefore, the number you are looking for is 2.
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A square root of a number is a number that, multiplied by itself once, will equal the first number. Meanwhile a cube root of a number is a number that, multiplied by itself twice, will equal the first number. For example: the square root of 4 is 2. [ 2 X 2 = 4 ] [ 2 times itself equals 4 ] : the cube root of 8 is 2. [ 2 X 2 X 2 = 8 ] [ 2 times itself, and then times itself again, equals 4 ]
The number "4"
Think of it this way...how many times can you divide a number by itself? The answer is always once. 4 divided by 4 equals 1. Using the number 4, 8 divided by 4 equals 2. In other words, 8 is equal to two 4s, right? But one 4 is always one 4.