Removing brackets is to multiply the term outside the brackets by each term inside - also known as the distributive law. Use FOIL to remove a pair of brackets then simplify by collecting like terms.

She’s right—using simultaneous equations does get really complicated, and if you’d like to send me your work for the solution, I’d love to see it. But the system is also kind of a trick. Like a sudoku ...

Try these interactive flashcards based on GCSE maths past papers. By working your way through the flashcards created by experts, you can prepare for your maths exams and revise commonly used ...