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