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

GR
Answered by Glen R. Maths tutor

4165 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Grade 8/9 question: Point A (0,1) and Point B (10,6) lie on a straight line. Find the equation of the line perpendicular to AB which also intersects B.


A group of 55 students were asked if they had a cat or a dog. 11 were known to own both, 18 said they owned only a dog, and 34 said they owned at least a cat. Give the probability that a student has neither as a fraction in its simplest form.


Share £650 in the ratio 8:5


Solve equations 2x+y=9 and x+2y=6 to find x and y.


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