6460150
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Mind Map by Ashliya Pathania, updated more than 1 year ago
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Surds
- √ab=√a X
√b
- This means when one is a square number we can get rid of it. For example. √8=√4 X
√2.
- √4=2
- Therefore simplified we can make it equal to
2√2
- Therefore simplified we can make it equal to
2√2
- √4=2
- This means when one is a square number we can get rid of it. For example. √8=√4 X
√2.
- Rationalise the
denominator
- When a surd is on the bottom we rationalise it to get it on the top.
- We do this by multiplying the bottom and top by the surd that is on the
bottom.
- We do this by multiplying the bottom and top by the surd that is on the
bottom.
- When a surd is on the bottom we rationalise it to get it on the top.
- What is a
Surd?
- A number that cannot be shown as a decimal has it has a
never ending never repeating set of decimals like pie does.
- A number that cannot be shown as a decimal has it has a
never ending never repeating set of decimals like pie does.
- Notice that rounding Equation: √2 to 3 decimal places is 1.414. 1.4142 does not quite equal 2 - there is
a rounding error. 1.414 is an approximation whereas Equation: √2 is exact.
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