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If a quadratic equation is of the form ax²+bx+c, calculate D (Discriminant) whose value is b²-4ac. 

If the value of D is negative, the equation has imaginary roots.<...

Elements of group 0 are called noble gases. These elements have stable arrangements of electrons in their outermost shell. The chemical reactivity of a group highly depends on the number of electrons i...

When a ray of light travels from a denser medium to a rarer medium it bends away from the normal. It the angle of incidence is too large, the angle of refraction will be very large as well (It can be p...

Such an integral looks difficult to manage; clearly it is a case of integration by parts, but neither part of the product appears to reduce easily into a nicer form.

The key here is use t...

It has been shown that replacing the justification condition in the classical account of knowledge is neither necessary, nor sufficient, to grant a person knowledge. 

Consider a person dr...