Nita B.

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Degree: BSc Accounting and Finance (Bachelors) - Bristol University

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Hi! I'm Nita, second year Accounting and Finance student at the University of Bristol. I am keen on sharing my experiences and help out in Maths at GCSE level.

#### Subjects offered

SubjectLevelMy prices
Maths A Level £20 /hr
Maths GCSE £18 /hr

#### Qualifications

EconomicsA-LevelA*
MathematicsA-LevelA
 CRB/DBS Standard No CRB/DBS Enhanced ✓ 12/11/2014

### Surd Calculations?

Surds are numbers left in 'square root form' (or 'cube root form' etc). They are therefore irrational numbers. Surds are the root of numbers and not whole numbers. Multiplication Example:  √2 × √6 = √12 (= 2× 6) = √4 × √3 = 2√3 Addition and Subtraction 4√3 - 2√3 = 2√3 5√5 + 8√5 = 13...

Surds are numbers left in 'square root form' (or 'cube root form' etc). They are therefore irrational numbers. Surds are the root of numbers and not whole numbers.

Multiplication

Example:

√2 × √6 = √12 (= 2× 6)

= √4 × √3

= 2√3

4√3 - 2√3 = 2√3

5√5 + 8√5 = 13√5

Note: 5√7 + 3√3 cannot be manipulated because the surds are different (one is √7 and one is √3)

Example:

Simplify √12 + √27

12 = 3 × 4. So √12 = √(3 × 4) = √3 × √4 = 2 × √3.

Similarly, √27 = 3√3.

Hence √12 + √27 = 2√3 + 3√3 = 5√3

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2 years ago

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