Cette leçon contient 15 diapositives, avec quiz interactif et diapositives de texte.
La durée de la leçon est: 50 min
Éléments de cette leçon
What are these graphs called?
Slide 1 - Carte mentale
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 - Diapositive
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 - Diapositive
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timer
5:00
Slide 5 - Diapositive
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 - Diapositive
timer
5:00
Slide 7 - Diapositive
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
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timer
3:00
Slide 10 - Diapositive
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.
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HW Thursday
Do all the §5.0 Refresh exercises and correct them
La durée de la leçon est: 50 min
