Advertisements
Advertisements
Question
Find the square of : √5 - 2
Solution
( √5 - 2 )2 = ( √5 )2 - 2( √5 )( 2 ) + ( 2 )2
= 5 - 4√5 + 4
= 9 - 4√5
APPEARS IN
RELATED QUESTIONS
Examine, whether the following number are rational or irrational:
`sqrt3+sqrt2`
Give two rational numbers lying between 0.232332333233332... and 0.212112111211112.
Give an example of two irrational numbers whose:
difference is an irrational number.
Give an example of two irrational numbers whose:
product is an rational number.
Prove that the following is irrational:
`7sqrt5`
Given universal set =
`{ -6, -5 3/4, -sqrt4, -3/5, -3/8, 0, 4/5, 1, 1 2/3, sqrt8, 3.01, π, 8.47 }`
From the given set, find: set of rational numbers
Write a pair of irrational numbers whose difference is irrational.
Insert five irrational number's between `2sqrt(3) and 3sqrt(5)`.
Prove that `sqrt(p) + sqrt(q)` is irrational, where p, q are primes.
Classify the following number as rational or irrational with justification:
`- sqrt(0.4)`
