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Firstly you need to find the gradient and to do this you identify two points on the graph and the gradient is the change in the value of the y values divided by the change in the value of the x values...
You bring the power down to multiply by the existing coefficient of x =1 in this case, and then you reduce the existing power by 1 leaving you with dy/dx= 2x.
In algebra, long expressions can be simplified which makes them easier to solve.
We can simplify alebraic expressions by collecting together "like terms".
Wh...
You would use the quadratic formula when trying to find the value of a variable such as x in a quadratic equation but it can not be successfully factorised with whole numbers. Treating the the equatio...
Factorising is a way of 'converting' an equation into a form with brackets in order to make it more useful and easier to manipulate. It is the reverse of expan...
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