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The trick with this question is noticing the hidden quadratic as quartic equations are unsolvable at A-level.

Letting u=x^2 the question becomes u^2+2u-3=0 which most students would be able to solv...

Organic material accumulates in an area of fast plant growth and anaerobic conditons (which stops the vegetation decaying), such as a tropical delta, the organic material is buried which leads to increase...

An introduction to any history essay that is asking you to asses or evaluate and argument or interpretation should being with your personal standpoint and argument being outlined without using the first p...

Example.

" Solve the simultaneous equations

y + 4x + 1 = 0

y^2 + 5x^2 + 2x = 0 "

We can rearrange the first equation to something that we can substitute into the seco...

In this famous piece of anti-Japanese propaganda, ‘This Is The Enemy’, the message to the American public of the early 1940s seems obvious at first reading, and yet contains layers of meaning. We will fir...