Multiply out and simplify (x+7)(x-3)

Using FOIL (First, Outside, Inside, Last), we get:F: x2O: -3xI: 7xL: -21Adding these together gives x2 + (-3x) + 7x + (-21)Which is the same as x2 - 3x + 7x - 21Which simplifies to x2 + 4x - 21

Answered by Glen R. Maths tutor

4157 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A ladder 6.8m long is leaning against a wall, the foot of the ladder is 1.5m from the wall, find the height that the ladder reaches up the wall.


A triangle has sides of 4cm and 5cm with the hypotenuse unknown. What is the length of the unknown side?


Solve these two equations simultaneously: 7x + y = 1 and 2x^2 - y = 3.


Solving simultaneous questions, e.g. 3x + y = 11 and 2x + y = 8


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