This lesson contains 15 slides, with interactive quiz and text slides.
Lesson duration is: 50 min
Items in this lesson
What are these graphs called?
Slide 1 - Mind map
CH.5 Quadratic Formulas
Quadratic formulas are the type of formulas you will use most often in Mathematics.
Working with quadratic formulas requires you to work precisely and neatly and you need the skills you've learned in previous chapters.
Slide 2 - Slide
Recap: Order of Operations
When doing calculations, you have to follow the order of operations:
1. First calculate what is given between brackets.
2. Then calculate powers and roots.
3. Then multiply and divide from left to right.
4. Then add and subtract from left to right.
Slide 3 - Slide
Slide 4 - Slide
timer
5:00
Slide 5 - Slide
Recap: Square roots
The square root of 25 is 5, because the square of 5 is 25.
The square root of 6.25 is 2.5, because the square of 2.5 is 6.25
There is no square root of -16 (or any other negative number), because, there is no number you can square, to get a negative result
Slide 6 - Slide
timer
5:00
Slide 7 - Slide
Recap: Writing formulas shorter
You can write formulas shorter by:
- multiplying factors
- combining like terms
- not writing down the multiplication sign between a number and a variable
Slide 8 - Slide
Slide 9 - Slide
timer
3:00
Slide 10 - Slide
Recap: Quadratic formulas
If a formula contains the square of a variable (and not a higher exponent), it is called a quadratic formula.The corresponding graph is called a parabola.
When filling in negative numbers for the variable in a quadratic formula you should use brackets, because you want to square the negative number, not take the opposite of a positive square.
Slide 11 - Slide
Slide 12 - Slide
Slide 13 - Slide
Slide 14 - Slide
HW Thursday
Do all the §5.0 Refresh exercises and correct them
Lesson duration is: 50 min
