Factorise 6x^2 + 7x + 2

6x^2 + 7x + 2 can be written in the form ax^2 + bx + c. In order to factorise this I use the following method which can be used to factorise similar equations. Multiply 'a' and 'c' to get ac (here this is 6 x 2 = 12). Next, you have to look for factors of ac (12) which sum to get the coefficient for b. So here we have 3 and 4 (factors of 12) which add to 7. You can then write the equation in the following form: 6x^2 + 7x + 2 = (6x + 3)(6x + 4)/6,  Similarly, for any equation this would be ax^2 + bx + c = (ax + m)(ax + n)/a, where m and n are the coefficients which you found earlier. Using this, you simplify the right hand side by canceling down to remove the action of dividing by 6. (6x + 3)(6x + 4)/6 => (2x + 1)(6x + 4)/2 => (2x + 1)(3x + 2) which is the complete factorisation of 6x^2 + 7x + 2. 

HP
Answered by Hannah P. Further Mathematics tutor

11641 Views

See similar Further Mathematics GCSE tutors

Related Further Mathematics GCSE answers

All answers ▸

Can you explain induction and go through an example?


If y=x^3+9x, find gradient of the tangent at (2,1).


A particle is moving in a straight line from A to B with constant acceleration 4m/s^2. The velocity of the particle at A is 3m/s in the direction AB. The velocity of the particle at B is 18m/s in the same direction/ Find the distance from A to B.


l1 and l2 are tangents of a circle. l1 intersects the circle at (3-√3,5) with a gradient of √3, and l2 intersects the circle at (3+√2,4+√2) with a gradient of -1. Find the centre of the circle, and hence find the radius of the circle.


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning