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 ▸Jill and four friends go camping together for 5 days. The friends share the cost of the trip equally. These costs are: £120 for fuel, £58 for food, £100 for equipment and £207 for activities. How much does Jill have to pay for her share of the costs?
f(x) = 3x - 2a || g(x) = 2ax + 1 || fg(x) = 2x + b/2
A cuboid has length x cm. The width of the cuboid is 4 cm less than its length. The height of the cuboid is half of its length. The surface area of the cuboid is 90 cm^2 . Show that 2x^2 − 6x − 45 = 0
Solve the simultaneous equations: 2x + 3y = 5 and 3x + 4y = 12