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candidate should recognise the equation is a difference between two squares.
the next step is to factorise: square root of 25 is 5
(x-5)(x+5) = x^2-25
x= -5 x= 5

By cutting the solid magnesium into smaller pieces you are increasing the surface area and also making a larger surface area to volume ration. Increasing the surface area increases the rate of reaction as...

First the equation for y must be substituted into the first equation to give a quadratic equation in x. Rearrange this equation so that the left-hand side equals 0. Using the quadratic formula the possibl...

A factory producing clothes would likely produce air pollution. This is a negative externality as it is an unintended consequence of production.

A private limited company is when a business is no longer owned by a sole trader and individuals are able to invest into the business by buying shares. One way this would be beneficial for the business is...