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 ▸Work out 1 1/5 ÷ 3/4. Give your answer as a mixed number in its simplest form.
There is a cube with a length 3x. The expression for the volume in cubic centimeters is equal to the expression for the surface area in square centimeters. Calculate the length of a side of the cube.
Solve x^2 - 9 = 4x + 12
Factorise a^2 + a - 30