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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 fi...

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 diffe...

What's an endotherm? An animal that can increase its body temperature by metabolically produced heat.
Why does a decrease in temperature matter? 37ºC is the optimal temperature for enzyme function – ...

The fight or flight response is the body and brains reaction to a situation, resulting in either to withstand the situation (fight) or flee the situation (flight). Firstly the hypothalamus,a region of the...

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...