How can I factorise x^2 - 7x + 12?

So firstly, you want to split the equation into the format of a^2 + bx + c, so you know what a, b and c equal. a = 1b = -7c = 12 Now, you need to try to split the equation into the format (x + ?)(x + ?). To work out what the question marks are, you need to find the two numbers that: Add up to -7Multiply to 12So this would by -3, and -4. Now you have your two question marks, you need to put them into your factorised equation, making sure you keep the correct symbols. So the correct answer would be, (x-3)(x-4).

GD
Answered by Georgia D. Maths tutor

2614 Views

See similar Maths KS3 tutors

Related Maths KS3 answers

All answers ▸

What is the difference between '<' and '≤'?


Solve Simultaneous equations: 3x + 4y = 23 & 2x + 3y = 16


A quadrilateral shape has angles of 60, 75, and 105 degrees. How many degrees is the fourth angle?


Bob buys 33 pens and 21 rulers for £6. A ruler costs 8 pence more than a pen. How much does one pen cost?


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