Expand (x+3)(x+4)

When we come across questions like this, we expand by multiplying everything in the first bracket by everything in the second bracket. An easier way of doing this is rewriting the question like: x(3x+4) + 3(3x+4) and then we would expand these brackets out. The first bracket expands to 3x2+4x, and the second bracket expands to 9x+12. When we add up all the components we get 3x2+4x+9x+12. We must simplify this so we get, 3x2 +13x+12 which is our answer.

GC
Answered by Greg C. Maths tutor

10288 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

You are given a triangle ABC with sides length AB = 20cm, BC = 100cm and angle A = 70 degrees. Find the angle of C in degrees.


The equation of the line L1 is y=3x–2. The equation of the line L2 is 3y–9x+5=0. Show that these two lines are parallel.


Work out the value of 125 to the power of -2/3.


Find the nth term of the sequence 3,7,11,15...


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