Quadratics (Year 1 - Chapter 2)

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9 Terms

1
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Solving Quadratics

Factorise the Equation and then find the value of x which makes each function equal to 0.

2
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Quadratic Formula

The formula used to solve quadratic equations which cannot be easily factorised.

x=-b +- ROOT(B² - 4ac) / 2a.

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Completing the Square

(x + b/2)² - (b/2)².

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Domain

The set of possible inputs to a function.

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Range

The set of possible outputs from a function.

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Roots

The values of x within a function where the result of the function is 0.

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Turning Point

The coordinate at which a quadratic parabola turns and travels the other direction (gradient crosses 0).

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Discriminant

The value under the square root within the quadratic formulae, it shows the number of real roots an equation has.

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Mathematic Model

A mathematical description of a real life situation, used to predict future changes.