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Unit
N2
Surds
Surds
appear frequently in mathematical calculations, especially when
trying to solve
quadratic equations.
Generally we prefer to write  rather
than the decimal expansion 1.732….. This is because (a) its
quicker, (b) the decimal expansion is never fully accurate and
(c) the decimal digits don’t
follow a simple pattern. For this latter reason we say that surds
are irrational numbers.
Unit
N2.1: Simplifying Surds
Unit N2.2: Adding and subtracting
surds
Unit N2.3: Multiplying out surds
Unit N2.4: Rationalising the denominator
**Unit N2.5: Solving equations
with surds.**
Learning Objectives
In this section the student will be able to
- Write surds
in their simplest form.
- Add,
Subtract and Multiply surds.
- Divide surds
using the principle of conjugation.
- Solve surdal
equations.**
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