Top answers

Factorise (x+3)(x-8)

(x+3)(x-8) x*x= x^2 x*-8= -8x 3*x= 3x 3*-8= -24 =x^2 - 8x + 3x - 24 =x^2 - 5x - 24
NJ
Answered by Nikhitha J. • Maths tutor
4106 Views

Eleri invests £3700 for 3 years at 2% per annum compound interest. Calculate the value of her investment at the end of the 3 years. Give your answer correct to the nearest penny.

This question is a classic example of a problem which might catch some students out, if due care is not implemented. Eleri is investing £3700 at 2% per annum compound interest. This means that the sum of the...
OS
Answered by Osian S. • Maths tutor
7384 Views

How do I solve 7x – 8 = -3x + 2?

I would always approach this type of question methodically in the same way each time to minimise panic in exams. 1. Collect the like terms together (10x = 10) 2.Divide to find the solution (x=10)
MP
Answered by Madeleine P. • Maths tutor
6656 Views

How do I remember the area of a circle if it's not in the formula book?

I tend to use rhymes to remember difficult maths formulas - it makes life so much easier! For example, "I never knew how much I cared that the area of a circle is πr²".
MP
Answered by Madeleine P. • Maths tutor
4727 Views

What is the easiest way to expand quadratic equations?

There are many methods of expanding quadratic equations, however there is one method which I find to be far easier than the others. This method is called the "box method", and allows this to be don...
AC
Answered by Alexander C. • Maths tutor
15919 Views