Question

dada função f(x) x² +3x-4
f(0)
f(-2)
f(x)=0
f(x)=6

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Answer 1

Explicação passo-a-passo:

f(0) = 1.(0)² + 3.0 - 4 = 1.0 + 0 - 4 = -4

f(-2) = 1.(-2)² + 3. (-2) - 4 = 1.4 - 6 - 4 = -6

f(x)=0

a= 1; b = 3; c = -4

D = 3² - 4 . 1 . (-4)

D = 9 + 16

D = 25

x' = -3 + 5

2 .1

x' = -3 + 5

2

x' = 2

2

x' = 1

x" = -3 - 5

2 .1

x" = -3 - 5

2

x'' = -8

2

x'' = -4

f(x)=6

x² +3x-4 = 6

x² + 3x - 10 = 0

a= 1; b = 3; c = -10

D = 3² - 4 . 1 . (-10)

D = 9 + 40

D = 49

x' = -3 + 7

2 .1

x' = -3 + 7

2

x' = 4

2

x' = 2

x" = -3 - 7

2 .1

x" = -3 - 7

2

x'' = -10

2

x'' = -5