
Produtos Notáveis (Outros)
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Mathematics
•
9th Grade
•
Hard
Daniel Lima
Used 4+ times
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9 Slides • 3 Questions
1
Produtos Notáveis
Profº Daniel Sena
2
Produto do tipo (x + a)(x+b)
(x +a)(x + b)=x2 +(a + b)x +ab
3
Outra maneira de escrever
(x+a)(x+b)=x2 +Sx +P
S eˊ a soma (a+b) e P eˊ o produto (ab)
4
Exemplos:
(x+5)(x+2)=x2 +(5+2)x+5⋅2=x2 +7x+10
(x+2)(x+4)= x2+(2+4)x+2⋅4=x2+6x+8
(x−1)(x+7)=x2+(−1+7)x+(−1)⋅7=x2+6x−7
(x−8)(x−10)=x2+((−8)+(−10))x+(−8)⋅(−10)⟹
⟹ x2−18x+80.
5
Multiple Choice
Encontre a soluça~o do produto a seguir (x+8)(x+3).
x2+24x+12
x2+11x+11
x2 +11x+24
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Multiple Select
Encontre a solução do binômio a seguir (x+6)(x−8).
x2+2x−48
x2+14x−2
x2−2x−48
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Quadrado da soma de três números
(a+b+c)2=(a+b+c)(a+b+c)⟹
⟹ a2+ab+ac+ba+b2+bc+ca+cb+c2⟹
⟹a2+b2+c2+2ab+2ac+2bc
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Exemplo:
(a+2y+3)2=a2+(2y)2+(3)2+2a⋅2y+2a⋅3+2⋅2y⋅3
⟹ a2+4y2+9+4ay+6a+12y
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Multiple Choice
(x+y+2)2
Assinale a alternativa correta do desenvolvimento do quadrado da soma de três números, acima.
x2+y2+4+2xy+4x+4y
x2+y2+2+2xy+4xy+4y
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Produto (a+b)(a2 -ab+b2)
(a+b)(a2−a⋅b+b2)=a3+b3
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Exemplo
(x+3)(x2−3x+9)=x3+27
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Produto (a - b)(a2 + ab + b2)
(x−3)(x2+3x+9)=x3−27
(x−5)(x2+5x+25)=x3−125
Produtos Notáveis
Profº Daniel Sena
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