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Take example (x+3)(x-4) We use FOIL - first, outer, inner, last  We multiply each part by the other part. First -> x times x = x² . Outer -> x times -4 = -4x (remember the minus infront o...

Economic growth is an increase in the production of good and services in an economy over time. 

[Differentiate y = ln(x)] This is an example of many situations in maths where you need to solve something that is similar to what you can solve, but not in its current form. A good idea, then, i...

Mutations of pathogens produce new strains. Vaccinations may no longer be effective against these new strains. Vaccinations would kill non-resistant strain pathogens. However, resistant strain pathogens w...

Vaccines are small quantities of dead or inactive forms of a pathogen (disease). Vaccines stimulate white blood cells to produce antibodies. These antibodies destroy the pathogensthis makes the person imm...