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Maths
GCSE

Solve the equation:

5x-3=72x+1

log55x-3=log572x+1

x-3=(2x+1)log57

x-2xlog57=3+log57

x(1-2...

Answered by Nina H. Maths tutor
4064 Views

How to find conditional probability

Take this problem as an example: 

5 white socks and 3 black socks are in a drawer. Stefan takes out two socks at random. Work out the probability that Stefan takes out two socks of the same co...

Answered by Joseph U. Maths tutor
10804 Views

How do I solve the equation x^2 = 3x - 1 ?

First, we need to rearrange the equation into a quadratic. A quadratic equation will always have a squared element. 

To this, we move everything over to the left hand side of the equation and ...

Answered by Matthew W. Maths tutor
7213 Views

Expand (2x-3)(4x+4) using the FOIL method.

Question: 

Expand (2x-3)(4x+4) 

We will be using the FOIL method. FOIL is an ancronym: 

F=first

O=outside

I=inside

L=last

So, to begin, we start...

Answered by Miriam W. Maths tutor
9303 Views

How do I expand a factorised equation?

Firstly put the equation into the the form (x+a)(x+b) this will make things easier later on.

Therefore, an equation such as (x+1)2 would become (x+1)(x+1)

Next expand the br...

Answered by Emily G. Maths tutor
3035 Views

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