Question

Ache a raiz das equações:
x²-10x+25=0 k²-25=0
m²+2m+1=0
2x²+8x+8=0
81+18z+z²=0​

Answer 1

a) x² - 10x + 25 = 0

Δ = -10² - 4 . 1 . 25

Δ = 100 - 100

Δ = 0

x = 10 ± 0 / 2

x' = 10 / 2 = 5

x" = 10 / 2 = 5

b) k² - 25 = 0

Δ = 0² - 4 . 1 . - 25

Δ = 0 + 100

Δ = 100

x = 0 ± 10 / 2

x' = 5

x" = -5

c) m² + 2m + 1 = 0

Δ = 2² - 4 . 1 . 1

Δ  = 4 - 4

Δ  = 0

x = -2 ± 0 / 2

x' = -1

x" = -1

d) 2x² + 8x + 8 = 0

Δ  = 8² - 4 . 2 . 8

Δ = 64 - 64

Δ = 0

x = -8 ± 0 / 4

x' = -2

x" = -2

e) 81 + 18z + z²

Δ = 18² - 4 . 1 . 81

Δ = 324 - 324

Δ = 0

x = - 18 ± 0 / 2

x' = - 9

x" = -9

Espero ter ajudado ;)