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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)
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Answered by Madeleine P. Maths tutor
6748 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
4830 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...
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Answered by Miriam G. Maths tutor
125031 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
16071 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 ...
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Answered by Irfan S. Maths tutor
54753 Views