Expand (x+1)(x-4)

Using the "FOIL" Technique should help with the expansion, telling you what order to multiply things together. F stands for "firsts", so the first step is to multiply the first things in each bracket together and you get x^2. O stands "outsides" so the next step is to multiply the things on the outside of each bracket together and we get -4x. I stands for "insides" so next we multiply the things on the inside of each bracket, and we get x. Finally, L stands for "lasts" so we finish by multiplying the last thing in each bracket together and we get -4. The last step is then to put it all together and tidy it up. So we get x^2-4x+x-4 which simplifies to x^2-3x-4.

Answered by Emily G. Maths tutor

4289 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve this simultaneous equation using the process of elimination: -6x - 2y = 14 3x - 2y = 5


There are 60 students on a school trip. Each student is either one of, vegan, gluten free, or neither. 27 students were girls. 9 girls were gluten free. 21 students were vegan. 8 boys were vegan. 4 boys were gluten free. How many boys had no dietary's?


Factorise and solve x2 - 8x + 15 = 0.


Where does the quadratic equation come from?


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