Quadratics Y1

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Solving quadratics

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Completing The Square

When and why, would we complete the square?

How do you complete the square?

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Quadratic formula

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Functions

WHAT IS A FUNCTION

A function is the relationship with inputs with outputs that helps us map them out.

WHAT IS THE DOMAIN?

The domain is all the values of x you can input into a function

WHAT IS THE RANGE?

The range of a function is the complete set of all possible outputs, (usually all the possible y values), after we have substituted the domain. So basically it is the lowest y-value to the highest y-value we get after substituting all the possible x-values.

How do you calculate the roots of a function?

When we make a function equal to zero, it tells us when the graph crosses the x axis. Which we can use to calculate the roots.

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Sketching quadratics

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Discriminants

What are discriminants used for?

They are used to tell us the number of distinct roots a function has.