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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
6835 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".
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Answered by Madeleine P. • Maths tutor
4935 Views

Prove that the derivative of tan(x) is sec^2(x).

Let y = tan(x) Recall the definition of tan(x) as sin(x)/cos(x) Therefore y = sin(x)/cos(x) Use the quotient rule, which states that for y = f(x)/g(x), dy/dx = (f'(x)g(x) - f(x)g'(x))/g 2 (x) with f(x) = sin...
MG
Answered by Miriam G. • Maths tutor
126237 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
16242 Views

Find the value of 0.3 × 0.2

This question asks us to multiply 2 decimal numbersThe steps involved with this question include:Step 1) Manipulate the numbers we are working with to give us an easier calculation.Step 2) Once we have done ...
IS
Answered by Irfan S. • Maths tutor
55956 Views