Question

equacao de 2* grau

* 16x²+4x+9=100

Answer 1

Resolução:

16x² + 4x + 9 = 100

16x² + 4x + 9 - 100 = 0

16x² + 4x - 91 = 0

a = 16

b = 4

c = - 91

Δ = b² - 4ac

Δ = 4² - 4 . 16 . (- 91)

Δ = 16 + 5824

Δ = 5840

x = - b +- √Δ/2a

x = - 4 +- √5840/2 . 16

x = - 4 +- 76,42/32

x' = - 4 + 76,42/32

x' = 72,42/32

x' = 2,26

x'' = - 4 - 76,42/32

x'' = - 80,42/32

x'' = - 2,51