Cette leçon contient 23 diapositives, avec quiz interactifs et diapositives de texte.
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Factoring trinomials
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Slide 1 - Diapositive
Today
Start (5 min)
New subject (20 min)
Bettermarks (20 min)
End lesson (5 min)
Slide 2 - Diapositive
Recap last lesson 13.2: Factoring binomials
Factor:
15p2+10p
Slide 3 - Diapositive
Factor:
10r2+14r
timer
1:00
Slide 4 - Question ouverte
Recap 13.2 Factoring binomials
Factor:
10r2+14r
Slide 5 - Diapositive
Recap 13.2 Factoring binomials
Factor:
Solve:
10r2+14r
10r2+14r=0
Slide 6 - Diapositive
Solve:
4x2+7x=0
timer
2:00
Slide 7 - Question ouverte
Solve:
4x2+7x=0
Slide 8 - Diapositive
Find a, b and c in the formula
12x2−5x+17
timer
1:00
Slide 9 - Question ouverte
Note 13.3: Factoring trinomials
When factoring trinomials you are going to use the product-sum method. You need to find two numbers whose product (multiplied) is c and whose sum (added) is b.
Example: Factor
So
x2+29x+100
4⋅25=100
4+25=29
x2+29x+100=(x+4)(x+25)
timer
4:00
Slide 10 - Diapositive
Factorizing trinomials
x2+7x+10
Slide 11 - Diapositive
Factor
x2+9x+8
timer
1:00
Slide 12 - Question ouverte
Factor
x2+9x+8
Slide 13 - Diapositive
Factor
x2+19x+90
timer
1:00
Slide 14 - Question ouverte
Factor
x2+19x+90
Slide 15 - Diapositive
Factor
x2+6x−7
timer
1:00
Slide 16 - Question ouverte
Factor
x2+6x−7
Slide 17 - Diapositive
Solving trinomials:
x2+9x+20=0
Slide 18 - Diapositive
Solving trinomials:
x2+9x+20=0
(x+4)(x+5)=0
Slide 19 - Diapositive
Solving trinomials:
or
x2+9x+20=0
(x+4)(x+5)=0
x+4=0
x+5=0
Slide 20 - Diapositive
Solving trinomials:
or
or
x2+9x+20=0
(x+4)(x+5)=0
x+4=0
x+5=0
x=−4
x=−5
Slide 21 - Diapositive
13.3 Factoring trinomials
Solving a trinomial using the product-sum method:
Example, solve: Step 1: Factorize
Step 2: Make equations or Step 3: Solve the equations or
x2+9x+20=0
(x+4)(x+5)=0
x+4=0
x+5=0
x=−4
x=−5
Slide 22 - Diapositive
Bettermarks
Work on 13.3
Until the end of the lesson
Raise your finger if you have any questions or when you're finished