express the following fraction in the form of m + (n)^1/2. the fraction is ((3*(5)^1/2)^2 - 7)/(3 + 7*(5)^1/2). where m,n are real numbers.

first of all you would see that at the bottom of the fraction it is not an integer so first of all you would need to rationalise the denominator. the denominator is the bit at the bottom of the fraction. You would do this by multiplying both the top and bottom of the fraction but the number which is the conjugate to that of the number on the denominator, in this case it would be (3 - 7*(5)^1/2). from this you would get an integer on the bottom on the fraction, which here would be 354 . from here you would need to multiple the numerator by the same thing you did on the denominator and then you are able to get a number in the form m + n(5)1/2, which in this case is (114 - 266*(5)^1/2)/354

HC
Answered by Hugh C. Maths tutor

3592 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

How can I use the normal distribution table to find probabilities other than P(z<Z)?


A curve has parametric equations x = 1 - cos(t), y = sin(t)sin(2t) for 0 <= t <= pi. Find the coordinates where the curve meets the x-axis.


Let C : x^2-4x+2k be a parabola, with vertex m. By taking derivatives or otherwise discuss, as k varies, the coordinates of m and, accordingly, the number of solutions of the equation x^2-4x+2k=0. Illustrate your work with graphs


Which A-level modules did you take?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning