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In George Orwell's dystopian novella "Animal Farm" (1946), Squealer is a character that repeatedly abuses language to manipulate the other animals in order to justify Napoleon's action. This is esp...

We first notice it's a quadratic equation in x so we want to make one side of the equation equal to 0.By adding 15 to both sides we get : x 2 + 8x + 15 = 0We then look for two numbers which multiply to 15 an...

It can be so hard to identify which of all the masses of facts and figures and definitions you have learnt you need to include for a particular question, especially given the degree to which topics and theme...

Throughout the history of the Earth, the climate has always been changing. This is clear from evidence of cycles of glacial advance and retreat. However the last ice age ended abruptly and this can be associ...

Completing the square is a method for rewriting a quadratic expression, and can be useful in identifying the minimum value of the expression. The aim is to end up with an expression which looks like c((x+a)^...