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How do I factorise a quadratic equation?

To factorise an equation is to put it into (usually two) brackets in the form (x+a)(x+b), where a and b are integers, which multiply out to make the original equation. So whenever you see the word factorise,...
JH
Answered by Juliette H. • Maths tutor
3979 Views

What is the domain and what is the range

The domain is a set of all possible values for variables that are input in to a function. The range of a funciton is a set of values that may be the output of a funciton. For one to one functions, the invers...
TH
Answered by Tom H. • Maths tutor
13399 Views

What is a limit

a limit is concerned with how a funciton behaves very close to a certain point. it is written simply as limf(x) = A, x>a this means as x approaches a, f(x) equals A
TH
Answered by Tom H. • Maths tutor
3969 Views

A school has 1200 pupils. 575 of these pupils are girls. 2/5 of the girls like sports. 3/5 of the boys like sport. Work out the total number of pupils in the school who like sport.

As we are told the number of girls that are in the school, our first step should be to calculate the number of boys in the school through a simple subtraction (1200-575 = 625). After this we are told that 2/...
GB
Answered by Gianluca B. • Maths tutor
14209 Views

A radio sells for £63, after a 40% increase in the cost price. Find the cost price.

X+2/5X = 63 or 63 = 140% First we need to understand that the original price (X) has been increased by 40%. Hence, by 2/5 (40/100 = 40%) of its original value, in other words, 2/5X. To find the answer we the...
GB
Answered by Gianluca B. • Maths tutor
6769 Views