How to expand double brackets?

Use the FOIL method, first, outside, inside, last. 1) F: The first term in the first bracket multiplies the first term in the second bracket. 2) O: The first term in the first bracket jumps outside to multiply the second term in the second bracket. 3) I: The second term in the first bracket multiplies the first term in the second bracket so the two 'inside' terms are multiplying together 4) L: The second term in the first bracket multiplies the second term in second bracket so both of the last terms are multiplying together EXAMPLEexpand: (X - 5) (X +2) = 0 1) X x X = X2 2) X x 2 = 2X 3) -5 x X = -5X 4) -5 x 2 = -10put it all together: X2 + 2X - 5X -10 =0 simplify: X2 -3X -10 = 0

HT
Answered by Hannah T. Maths tutor

2837 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Expand (x+3)(x+1).


Solve for x and y: x ^2 +2y = 9,y = x + 3


What is the size of the interior angle of a regular 12-sided polygon?


I want to buy 1 litre of milk. My options are to either buy 250ml bottles for £1 each or 500ml bottles for £1.50 each. Which is the cheapest way for me to buy 1 litre of milk?


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