This week in precalculus 11 I learned about Rational Expression. It was an easy and short lesson.

Here is an example:

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# Author: floras2016

# Week 14 – precalculus 11

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This week in precalculus11 I learned about analyzing the quadratic function of the form . Each of these words represents something on the graph.

a is the coefficient. It shows the stretch or compression of the parabola. If a > 0 parabola becomes skinnier, and if a < 1the parabola becomes wider. Also, a shows whether the parabola opens up or reflect down.

P represents horizontal translation.

q represents vertical translation.

Here is an example:

This week in precalculus 11 I learned about discriminant. It was an easy lesson. The expression , is called discriminant of the quadratic equation because it discriminates among the types of possible solution. Here is an example:

calculate the value of the discriminant of this quadratic equation.

first step: write down the equation first

second step: write down what is a, b and c

a= 2 b=-8 c= 4

third step: put everything in the equation

64+32=96

this equation has two real roots so 97> 0