Unit 2: Surds

Rules:

1. 2√3 = √4 x √3= √(4x3) 
2. √3/√5 = √(3/5)
3. √3 x √3 = 3

Definition= An irrational number that cannot be a fraction

Rationalising the denominator:

The difference of two squares:

a2 - b2= (a - b)(a + b)