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Solve the following simultaneous equations: 4x + y = 14 and 6x - y = 16

First, write out the equations beneath each other:

4x + y = 14

6x - y = 16

 

Then, label the equations a and b (let's take the top one as a, and the bottom one as b)

RS
Answered by Rebecca S. • Maths tutor
7777 Views

Prove why the quadratic formula works

How do you factorise a quadratic equation?

Take the example 2x2 + 7x + 3 = 0

1. To factorise we need to use the general equation 'ax + bx - c = 0'   where in our case a = 2 b =7 c=3.

2. First we need to mulitply the ...

Z(
2890 Views

How to differentiate using the Product Rule

The Product Rule is used when differentiating two functions that are bei...

CM
Answered by Callum M. • Maths tutor
5484 Views

What is the derivative of x^x

Firstly we should notice the similarities between this expression and expressions of the standard type ax. 

DK
Answered by Daniel K. • Maths tutor
5391 Views

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