Background Knowledge By the end of this lesson you will be able to explain/calculate the following: 1.Surds 2.Radicals.

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Background Knowledge By the end of this lesson you will be able to explain/calculate the following: 1.Surds 2.Radicals

Surds and Radicals radical A radical is any number which is written with the radical sign surd A surd is a real, irrational radical such as Surds are present in solutions to some quadratic equations. is a radical but is not a surd as it simplifies to 2.

Surds and Radicals - Properties is the non-negative number such that is never negative, so is meaningful only for for

Worked Example 1

Exercise A

Worked Example 2

Exercise A

Worked Example 3 Factorise 18 with the highest possible square factor

Exercise A

Worked Example 4

Exercise A

Worked Example 5

Exercise A