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Here we have a product of two things, so we will be using the product rule of differentiation. This is: for y=u(x)v(x), where u(x) and v(x) are funtions of x, dy/dx = u'(x)v(x) + u(x)v'(x). So in this case l...

Lets compare the numbers in the question: 34.6 x 2.7 is the same as 346/10 x 27/10 (decimal to fraction) therefore... 34.6 x 2.7 is the same as ( 346 x 27 ) /100 (multiplying top & bottom) so if 346 × 27...

This is a quadratic equation. When we are asked to facorise a quadratic equation, we should label the 3 parts of it a, b and c. x² + 10x + 16 a b c so a = 1 , b = 10 , c = 16 Now, we need to find two numbers...

We can't integrate cos^2(x) as it is, so we want to change it into another form. We can easily do this using trig identities . 1) Recall the double angle formula: cos(2x) = cos^2(x) - sin^2(x). 2) We also kn...

Remember the uproar on Twitter about an Edexcel GCSE Maths paper, sparking the #EdexcelMaths trend on Twitter? Whether you do or don't, the question that caused the controversy is within the GCSE syllabus an...