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How do I expand (x+a)(x+b)? (plus example)

The key to understanding expanding brackets is to understand that we need to multipy EVERYTHING in the first bracket by EVERYTHING in the second bracket. We can think of the calculation (x+a)(x+b) as x(x+b) ...
JB
Answered by Jenny B. • Maths tutor
17033 Views

How to add fractions

A: Firstly to add fractions the denominators have to be the same. For example, 3/7 + 2/3 firstly you need to work out the lcm of 7 and 3, in this case it is 21. So each fraction needs to be put into the form...
JL
Answered by Jennifer L. • Maths tutor
6106 Views

What is the cosine rule and when can it be used?

The cosine rule is used to find the length of a side or size of an angle. Take a look at the triangle below: For this triangle we have sides a, b and c and angles A,B and C. For this triangle the cosine rule...
KL
Answered by Kulvinder L. • Maths tutor
7994 Views

How do I solve a simultaneous equation?

You will be presented with two equations, both with two unknown values. For example: 8x-2y=19 and 3x=5+y To begin, we are going to move both unknown terms in the second equation to the same side: 3x-y=5 Then...
PC
Answered by Paul C. • Maths tutor
6288 Views

How do I draw a straight line graph given a y=mx+c equation by the table method?

The y=mx+c equation is for a straight line (also known as 'linear') graph. The ' y' is representative of the y-value, 'm' represents the gradient (how steep the graph is) and 'c' represents the y-intercept (...
NC
Answered by Neha C. • Maths tutor
15351 Views