Question

(√5 - 2 ) √5 + 2√5

(2√2 - 3) - (3 +2√2)

3√6 - 3√2 : √3 - 1

Answer 1

a) ( pier5 * pier5 - 2pier5) + 2pier5 = 5 - 2pier5 +2pier5 = 5

b) 2pier2 - 3 - 3 -2pier2 = -6

c) 3pier6 - 3pier2 / pier3 * pier3 / pier3 - 1 = 3pier6 - 3pier2 * pier3 / pier3 * pier3 - 1 = 3pier6 - 3pier6 / 3 - 1= 3pier6  - pier6 - 1 = 2pier6 -1  

Answer 2

(√5 - 2 ) √5 + 2√5 = 5 - 2√5 + 2√5 = 5

 

(2√2 - 3) - (3 +2√2) = 2√2 - 3 - 3 - 2√2 = - 6

 

  3√6 - 3√2     3√2(√3 - 1)

------------- = --------------- = 3√2

   √3 - 1            √3 - 1