- PuzzlingLv 71 decade agoFavourite answer
It is the simplified form a√b
For example √32 = √16 * √2 = 4√2
4√2 is "surd" form.
- Nick JLv 41 decade ago
Some numbers involving roots, such as √2, √3, cannot be expressed exactly in the form of a fraction. Any
number of the form n√a, which cannot be written as a fraction of two integers is called a surd.
Whilst numbers like √2 have decimal approximations which can be obtained using a calculator,
e.g √2 = 1.414 . . . , you must remember that these are approximations, whereas the form √2 is exact.
So, writing a number in surd form involves writing it in terms which are exact, such as √2 or √3
Example: write √48 in surd form
48 = 3*16
so √48 = √3 * √16
= √3 * 4
or, as it's usually written 4 √3
So, reduce the square root down into simpler terms called surds.
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- SantinaLv 44 years ago
I don't think you are supposed to use a CALCULATOR when the answer is required to be left in SURD form, or in terms of Pi. The object of those types of questions is to see if you know HOW to do the calculation. Mathematics is about knowing how to, not necessarily actually doing it. It's about the methods.
- Anonymous1 decade ago
If an answer is left in surd form it is left in the root form
eg... root2..... cannot be broken down evenly without makin a decimal..... therefore its left in surd form.....