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The curve is a quadratic equation because it has a x^2 - as it is positive it will be a u shaped parabola. The equation can be factorised by thinking of two numbers which add to make 4 (the b value) and m...
Solving simultaneous allows us to determine the value of two variables from two equations. 2x+y = 133x+2y = 21To find the value of the variables, our first step is to choose a variable and have equa...
161/5 x 2x =82/3 work out x
Chain rule:when we have a function on its own raised to a certain power. eg: f(x)=(2x+3)3--> f'(x)=3*2(2x+3)2Product rule:<...
First concentrate on expanding the squared term, don't try and do it all in your head, the 2x+3y term should expand to give 4 separate terms. Then combine any terms with the same configuration of x and y,...
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