Show that sqrt(20) = 2sqrt(5)

We can express sqrt(20) as sqrt (4 x 5). This is equivalent to sqrt(4) x sqrt(5). We know that sqrt(4) = 2. This sqrt(20) can be written as 2sqrt(5).

Answered by Monika P. Maths tutor

16713 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Find the coefficient of the constant term of the expression (2x+1/(4x^3 ))^8


Solve the simultaneous equations: (1) 4x + y = 7 and (2) x - 3y = 5


The equation of the line L1 is y = 3x – 2 . The equation of the line L2 is 3y – 9x + 5 = 0 Show that these two lines are parallel.


3x+2y=12 ; 5x+3y=19


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences