Question

2x ao quadrado-10x-12=0

Answer 1

2x^2-10x-12=0
a=2
b=10
c=-12
b^2-4.a.c
Delta =10^2-4.2.(-12)
Delta = 100+96
Delta = raíz quadrada de 196
Delta = 14
X = b + - raíz de 196
Sobre 2.b
X1 = -10 + 14/2.2
X1= -10+14/4
X1= 1
X2= -10-14/4
X2= -24/4
X2= -6

Answer 2

2x² - 10x - 12 = 0

A= 2

B= - 10

C= - 12

∆= b² - 4ac

∆= ( - 10)² - 4 • 2 • ( - 12)

∆= 100 + 96

∆= 196

x= - b ± √∆ / 2a

x= - ( - 10) ± √196 / 2 • 2

x'= 10 + 14/4 = 24/4 = 6

x''= 10 - 14/4 = - 4/4 = - 1

S=( 6 , - 1)