Learning intentions:
In this section we will examine:
The general quadratic formula
When quadratic equations become more complex, factorisation and using the null factor law to solve becomes a long and arduous process. However, the general quadratic formula can be easily applied to solve these problems.
4D - VIDEO EXAMPLE 1:
Use the general quadratic formula to solve the following equation for x:
4D - VIDEO EXAMPLE 2:
Use the general quadratic formula to solve the following equation for x:
4D - VIDEO EXAMPLE 3:
Use the general quadratic formula to solve the following equation for x:
The axis of symmetry
From the general quadratic formula, we can see that the x-intercepts are an equal distance from the the axis of symmetry (which will be explore further in completing the square):
Success criteria:
You will be successful if you can: