Term
Give two reasons for using surds... 

Definition
 You don't need a calculator
 They are more accurate as you don't have to round off.



Term

Definition


Term
What is the rule for multiplying surds? 

Definition


Term

Definition


Term
What is the rule for dividing surds? 

Definition


Term
Numbers in surds must be as small as possible. Break √48 into its factors. 

Definition
= √48
= √16x3
= √16 x √3
= 4 x √3
= 4√3 


Term
When splitting a surd into its factors, what must you do? 

Definition
Find the highest square number 


Term
Use FOIL to expand this expression:
(√3  2)(√3 + 4) 

Definition
F: √3 x √3 = √9
O: √3 x 4 = 4√3
I: √3 x 2 = 2√3
L: 2 x 4 = 8
FOIL: = √9 + 4√3 + 2√3  8
= 3 + 2√3  8
= 5 + 2√3


