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How do I expand (x-2)(3x+3) into a quadratic?

The expansion of two brackets containing two terms each is a little more complicated than expanding say, x(3x+3). There is a process to follow for these questions. First, just look at the x term in the first...
WP
Answered by William P. • Maths tutor
4782 Views

What is the chain rule?

The chain rule is a type of differentiation used when you are differentiating a function of a function e.g. (2x+5)^3, or e.g.2. (x^2 + 5)^0.5. Firstly you replace one function with u. You then differentiate ...
AS
Answered by Alice S. • Maths tutor
3977 Views

The curve C is paramterised by the equations: x = 5t + 3 ; y = 2 / t ; t > 0 Find y in terms of x and hence find dy/dx

x = 5t + 3 -> x - 3 = 5t -> (x - 3) / 5 = t y = 2 / t -> y = 2 / ((x - 3) / 5) -> y = 10 / (x - 3) dy/dx = d/dx (10 / (x - 3)) -> dy/dx= -10 (x - 3) -2
DC
Answered by Dylan C. • Maths tutor
4321 Views

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EA
Answered by Ertug A. • Maths tutor
4739 Views

How do you divide polynomials? How do you do it with remainder?

I'll show you on a whiteboard or a piece of paper, there's a nice grid method you can use which is a lot easier (I think) than the weird long division way I got taught in school.
TD
Answered by Tutor115090 D. • Maths tutor
3761 Views