Question

conta de bascara
(A) 3ײ- 6×-24 = 0
(B) 2ײ- 2× -12 =0

Answer 1

a) 3ײ- 6×-24 = 0 

a = 3
b = - 6 
c = -24 

Formula de delta

Δ = b² - 4 . a . c 
Δ = (-6)² - 4 . 3 . (-24) 
Δ = 36 + 288
Δ = 324

Formula de bhaskara 

$\\ \\ -b +- \sqrt{Delta} / 2.a$

6 +- √324 / 2.3
6 +- 18 / 6 

$\\ \\ x' = \frac{6 - 18}{6} = \frac{-12}{6} \ = -2$
$\\ \\ x'' = \frac{18 + 6}{6} = \frac{24}{6} = 4$

$\\ \\ s = (-2,4)$

b) 2ײ- 2× -12 =0

a = 2 
b = -2 
c = - 12 

Δ = b² - 4 . a . c 
Δ = (-2)² - 4 . 2 . (-12)
Δ = 4 + 96
Δ = 100

Formula de Bhaskara 

$\\ \\ -b +- \sqrt{Delta} / 2.a$

2 +- √100 / 2.2

2+- 10 / 4 

$\\ \\ x' = \frac{2-10}{4} = \frac{-8}{4} = -2$
$\\ \\ x'' = \frac{2 + 10}{4} = \frac{12}{4} = 3$

$\\ \\ s = (-2,3)$