Question

5) Dada a função f(X) = x²+4x-5,
usando a formula de Bhaskara, as raízes da função são
-) S=(1,5)
c) S=(1,4)
.) S= (2,3) d)S=(-1,4) e)S=(1,-5)​

Answer 1

Resposta:

( 1, -5 )

Explicação passo-a-passo:

x² + 4x - 5 = 0

a = 1

b = 4

c = -5

Δ = b² - 4 × a × c

Δ = ( 4 )² - 4 × ( 1 ) × ( -5 )

Δ = 16 - ( -20)

Δ = 36

x1 = - b + √ Δ / 2 × a

x1 = ( - ( 4 ) + √ 36 / 2 × 1

x1 = 1

x2 = - b - √ Δ / 2 × a

x2 = ( - ( 4 ) - √ 36 / 2 × 1

x2 = -5

S = ( 1 , -5 )