Write √80 in the form c√5, where c is a positive integer.

Firstly, we recall that √ab=√a x √b. Noticing that 80=16 x 5 then, we have that √80=√16 x √5. Since √16 = 4 then, we have that √80=4 x √5. So, giving the final answer in the form that the question asks: c=4, which is a positive integer (positive means greater than zero, integer means whole number, i.e. not a fraction or decimal).

Answered by Tutor524731 D. Maths tutor

6729 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

The line l1 has equation y = −2x + 3. The line l2 is perpendicular to l1 and passes through the point (5, 6). (a) Find an equation for l2 in the form ax + by + c = 0, where a, b and c are integers.


Find D when 8x^3-12x^2-2x+D is divided by 2x+1 when the remainder is -2


Find the volume of revolution when the area B is rotated 2 pi radians about the x axis


How do I find the angle between a vector and a plane in cartesian form?


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