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.

EG
Answered by Emily G. Maths tutor

4583 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve for X and Y: 2y + x = 7; 3y - x = 8


Expand and simplify (x − 4)(2x + 3y)^2


A truck is carrying 8.5 tonnes of produce. Find the amount of produce the truck is carrying in kg.


Please factorise fully: 2a^2 + 6a


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences