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leti2014
@leti2014
March 2022
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preciso de 8 questões de função quadrática, com cálculos e respostas .. Me ajudem por favor !
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claudiasoueu
A) y = x² - 5x + 6
x² - 5x + 6 = 0
Δ = b² - 4ac
Δ= (-5)² - 4.1.6
Δ= 25 - 24
Δ= 1
x =
-b +ou-√Δ
2a
x =
-(-5) +ou-√1
2 . 1
x =
5+ou- 1
2
x' =
5+1
=
3
2
x'' =
5 - 1
=
2
2
===========
b) x² - 36 = 0
x² = 36
x = +ou-√36
x' = 6
x'' = -6
===========
c) 2x² + 6x = 0
x( 2x + 6) = 0
x' = 0
2x + 6=0
2x = - 6
x=
-6
2
x'' = -3
============
d) -x² -7x -10 = 0
Δ=(-7)² - 4 .(-1).(-10)
Δ=49 - 40
Δ=9
x =
-(-7)+ou-√9
2(-1)
x =
7+ou-3
-2
x' = 10/-2
x'= -5
x'' = 4/-2
x''= -2
=======
e) -8x² = 0
x² = 0/8
x²=0
x = 0
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February 2021 | 0 Respostas
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Lista de comentários
x² - 5x + 6 = 0
Δ = b² - 4ac
Δ= (-5)² - 4.1.6
Δ= 25 - 24
Δ= 1
x = -b +ou-√Δ
2a
x = -(-5) +ou-√1
2 . 1
x = 5+ou- 1
2
x' = 5+1 = 3
2
x'' = 5 - 1 = 2
2
===========
b) x² - 36 = 0
x² = 36
x = +ou-√36
x' = 6
x'' = -6
===========
c) 2x² + 6x = 0
x( 2x + 6) = 0
x' = 0
2x + 6=0
2x = - 6
x= -6
2
x'' = -3
============
d) -x² -7x -10 = 0
Δ=(-7)² - 4 .(-1).(-10)
Δ=49 - 40
Δ=9
x = -(-7)+ou-√9
2(-1)
x = 7+ou-3
-2
x' = 10/-2
x'= -5
x'' = 4/-2
x''= -2
=======
e) -8x² = 0
x² = 0/8
x²=0
x = 0