1i) solve x^2-4x-21=0

Factorise to get (x+3)(x-7)=0 
So you can see that x = -3 or x =7 

Answered by Kishwar I. Maths tutor

3574 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

express the number 84 as a product of its prime factors


There are n sweets in a bag, 6 orange, rest yellow. H takes two, one after another, and eats them. Probability both are orange is 1/3. Show n^2 - n - 90 = 0.


solve 6(x + 4) = 2x -4


If a line t (f(x) = 2x +3) is perpendicular to a line n that passes through point (3,7), what is the equation of line n?


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