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To find the square root of a given number is to think of what number when
multiplied by itself is equal to the given number.
For example, to find the square root of 4, we have to think of a number
that when multiplied by itself gives 4. The number is 2 since 2 × 2 =
4.
So the square root of a given number is the positive number whose
square produces the given number.
Example 8
What number do you have to square to get each of the following numbers?
a. 144
b. 400
Solution:
Example 9
Solution:
Key Terms
square root, square root
symbol
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