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 ▸Make t the subject of this equation: x=4t-7
What are simultaneous equations and how do I solve them?
If x^2-5x+6=0, solve for x.
Olly drove 56 km from A to B. He then drives 61 km from B to C. Olly’s average speed from A to B was 70 km/h. Olly took 75 minutes to drive from B to C. Work out Olly’s average speed for his total drive from A to C.