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x^4 -8x^2 +15 = 0, we rewrite the equation in square form as (x^2-4)^2 -16 +15 =0 (x^2 -4)^2 = 1 x^2 -4 = ±1 so x^2 = 4±1, (x^2 = 3 or x^2 = 5) Therefore x = {-√3, √3, -√5, √5)

Knowledge is a subject which often arouses much controversy, as much today as in the Jacobean era. Biblically, knowledge was often associated with overreachers, primarily Eve who commits original sin. Dur...

Economic significance: The decision to enter ERM in 1990 was economically detrimental as this occured at a time when the £ was valued too highly compared to the Deutschmark, meaning the exchange rate coul...

There are two main explanations for this trend:

The 'Demand Side' explanation suggests that people are less engaged with politics because of the citizens themselves; in other words it is not the fa...

In order to find turning points, we differentiate the function. Hence we get f'(x)=2x + 4. Setting f'(x)=0 we get x = -2 and inputting this into f(x) we get y = 0 therefore the turning point is (-2,0). To...