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paulomt13
@paulomt13
July 2022
1
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fatoração de trinômios;
a) [tex] x^{2} - 5x -24[/tex]
b) [tex] y^{2} - 11y + 30[/tex]
c) [tex] 10v^{2} + 23v + 12[/tex]
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emicosonia
Fatoração de trinômios;
a)
x² - 5x - 24 =0
a = 1
b = - 5
c = - 24
Δ = b² - 4ac
Δ = (-5)² -4(1)(-24)
Δ = 25 + 96
Δ = 121
x1 =
-(-5) - √121
=
5 - 11
=
-6
= -3
2 2 2
x' = - 3
e
x" =
-(-5) + √121
=
5 + 11
=
16
= 8
2 2 2
x2= 8
(x - x1)(x - x2)
(x - (-3))(x - 8)
(x + 3)(x - 8)
x² - 5x - 24 = (x+3)(x-8)
b)
Δ = b² -4ac
Δ = (-11)² -4(1)(30)
Δ = 121 - 120
Δ = 1
y1 =
-(-11) - √1
=
11 - 1
=
10
= 5
2 2 2
y2 =
-(-11) + √1
=
11 + 1
=
12
= 6
2 2 2
(y - y1)(y - y2)
(y - 5)(y - 6)
y² - 11y + 30 = (y - 5)(y - 6)
c)
Δ = b² - 4ac
Δ = (23)² -4(10)(12)
Δ = 529 - 480
Δ = 49
v1 =
-23 - 7
=
-30
=
-3
20 20 2
v2 =
-23 + 7
=
- 16
=
- 4
20 20 5
(v - v1)(v - v2)
(v -(-3/2))(v - (-4/5))
(v + 3/2)(v + 4/5)
10v² + 23v + 12 = (v + 3/2)(v +4/5)
0 votes
Thanks 0
paulomt13
e todo o resto....
paulomt13
v x v não é 10v²
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Lista de comentários
a)
x² - 5x - 24 =0
a = 1
b = - 5
c = - 24
Δ = b² - 4ac
Δ = (-5)² -4(1)(-24)
Δ = 25 + 96
Δ = 121
x1 = -(-5) - √121 = 5 - 11 = -6 = -3
2 2 2
x' = - 3
e
x" = -(-5) + √121 = 5 + 11 = 16 = 8
2 2 2
x2= 8
(x - x1)(x - x2)
(x - (-3))(x - 8)
(x + 3)(x - 8)
x² - 5x - 24 = (x+3)(x-8)
b)
Δ = b² -4ac
Δ = (-11)² -4(1)(30)
Δ = 121 - 120
Δ = 1
y1 = -(-11) - √1 = 11 - 1 = 10 = 5
2 2 2
y2 = -(-11) + √1 = 11 + 1 = 12 = 6
2 2 2
(y - y1)(y - y2)
(y - 5)(y - 6)
y² - 11y + 30 = (y - 5)(y - 6)
c)
Δ = b² - 4ac
Δ = (23)² -4(10)(12)
Δ = 529 - 480
Δ = 49
v1 = -23 - 7 = -30 = -3
20 20 2
v2 = -23 + 7 = - 16 = - 4
20 20 5
(v - v1)(v - v2)
(v -(-3/2))(v - (-4/5))
(v + 3/2)(v + 4/5)
10v² + 23v + 12 = (v + 3/2)(v +4/5)