How do you expand brackets?
The easiest method to expand brackets would be to remember FOIL!
F - First
O - Outside
I - Inside
L - Last
Okay, so lets say you want to expand (3x+1)(2x+3), we'll fist multiply the first term of each bracket, 3x2x, which gives us 6x2. Next the outside term of each, 3x3, which makes 9x. Then the inside terms which are 12x, making just 2x. Finally the last terms, 31 which is just 3.
Adding these four together we get:
6x2+9x+2x+3
We can simplify the two x terms to leave us with a final answer of:
6x2+11x+3
CG
Related Maths GCSE answers
All answers ▸Frank buys a car at the start of 2015, for £12,000. Each year the value fo the car depreciates by 9%. What was the value of the car at the end of 2019?
What is the pythagoras theorem?
How do I solve a sum of equations with unknowns in the denominator?
Prove that the square of an odd number is always 1 more than a multiple of 4