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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)

At the drop height, the ball possesses 0J of Kinetic Energy (KE), and only possesses Gravitational Potential Energy(GPE). From GPE=mgh...GPE=O.5x9.91x10=49.05J. As it drops, its GPE decreases and its KE i...

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...

A gerund is essentially a verbal noun. This means the word comes from the stem of a verb, but acts as a noun in the sentence. e.g. "I like reading". In this sentence, 'reading' is the gerund. In...

Fiscal policy refers to the government's use of spending to either stimulate the economy or develop public services, or the government's use of certain means such as taxation to generate revenue. The two ...