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 ▸How do I simplify the following equation x^2+5x+6
You are given a sequence of numbers: -2, 12, 32, 58, 90, ... Work out the 7th term in this sequence.
A cycle race is 3069.25 miles. Juan travels at a speed of 15.12 miles per hour. He cycles for 8 hours a day. Estimate how many days Juan will take to complete the race.
how do you work out the gradient and point of interception of a linear graph given some coordinates