Expand and simplify x(x+4)(x-5)

Apply FOIL (First, outside, inside, last): (x + 4)(x - 5) = x2 - 5x + 4x -20 = x2 - x -20 x(x + 4)(x - 5) = x( x2 - x -20 ) = x3 - x2- 20x

JS
Answered by James S. Maths tutor

4080 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A family go into a shop, they buy three sandwiches and two packets of crisps. It costs them £9. Another family buy five sandwiches and six packets of crisps. It costs them £19. How much does two sandwiches and five packets of crisps cost?


When do I use the Sine rule?


In a sale a bag is reduced by 30%. The bag is now £31.50. Work out the original price of the bag.


Solve the simultaneous equations: 1) 3x+5y=14 and 2) -3y+10=x


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