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Maths
GCSE

Can you derive the Quadratic Formula?

For a general quadratic equation of the form ax2 + bx + c = 0 (1)
We will solve for x via the ‘Completing the Square‘ method:
 
First we divide equatio...
KA
Answered by Kamran A. Maths tutor
5568 Views

How do I complete the square of an equation?


How to factorise quadratic equations?

There are different ways of factoring an equation depending on the type. A few are highlighted here: 
1) Taking out a common factor 
General formula: ab + ac = ...

LB
Answered by Lydia B. Maths tutor
5930 Views

Solve the equation:

5x-3=72x+1

log55x-3=log572x+1

x-3=(2x+1)log57

x-2xlog57=3+log57

x(1-2...

NH
Answered by Nina H. Maths tutor
4706 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...

JU
Answered by Joseph U. Maths tutor
12268 Views

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