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How do you expand out and simply brackets, like the following: (x-3)(x+4)?

So when you want to expand out 2 brackets, there's a really simple method, known as FOIL. FOIL stands for "First, Outer, Inner, & Last". So if we look at the two brackets you gave as an example...
CK
Answered by Chang K. • Maths tutor
3906 Views

What is the purpose of myelin on a neurone?

The myelin on peripheral neurones come in the form of schwann cells. These schwann cells are essentially coils of fat that sit around the neurone and insulate it, this has two fundamental purposes. 1 - The f...
WH
Answered by Will H. • Biology tutor
2927 Views

What is the difference between a prokaryotic cell and a eukaryotic cell?

Prokaryotic cells are smaller and more simple than eukaryotic cells. They do not contain membrane bound organelles such as mitochondria, endoplasmic reticulum and golgi apparatus. They also do not have a nuc...
AS
Answered by Abbie S. • Biology tutor
4623 Views

How do I find the nth term of a sequence?

When given a sequence of numbers, there is often a rule using n, which symbolises the term of the sequence. For example in the sequence 3, 5, 7, 9, when n=1 it is referring to 3, since this is the first term...
KR
Answered by Katie R. • Maths tutor
7855 Views

Solve algebraically the following if there is a solution: x+y=3 2x+y=5 x^2+y=6

First we realize that the question asks IF there is a solutionLet us start with the simplest equations, x+y=3 and 2x+y=5By subtracting the first equation from the second we see x=2 and subbing into x+y=3 we ...
MS
Answered by Max S. • Maths tutor
3388 Views