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28-01-2017
Mathematics

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If x = -4, calculate 2x squared - 5

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TheHero TheHero

28-01-2017

You just substitute the value of x in the given equation:

f(x) = 2x^2 - 5

f(-4) = 2 (-4)^2 -5 = 27

f(x) : a name given to the equation
f(-4): refer to the equation when the value of the independent variable x has the value between the brackets.

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