Question

Resolver quatro equações entre as equações abaixo:
27) 8 X² - 2 X - 3 = 0

Answer 1

-b ±√∆'
X = _____
2a

-b ±√bû - 4ac'
X = _______
2a

2 ±√-2û - 4 * 8 * -3'
X = ____________
2 * 8

2±√4 - (-96)'
X = __________
16

2±√100'
X = ______
16

2 ± (10 )
X = _____
16

-8
X1 = _____
16

X1 = -0.50

12
X2 = _____
16

X2 = 0.75

Answer 2

8x² - 2x - 3 = 0
a = 8
b = - 2
c = - 3
Δ = b² - 4.a.c
Δ = ( - 2)² - 4.8. ( - 3)
Δ = 4  + 96
Δ = 100
x = - b + - √Δ/ 2a
x = - ( - 2) + - √100/ 2.8
x = + 2 + - 10/16
x' = 12/16 ⇒ x' = 3/4
x" = - 8/16 ⇒ x" = - 1/2

S = { 3/4  e  - 1/2 }