Question

2x²-10x-12=0 alguém pode me explicar?

Answer 1

d= b^2 -4.a.c
d=(-10)^2-4.2. (-12)
d=100+96
d=196

x= - b+-\/d/2a

x1= -(-10)+14/4
x1=24/4=6

x2=-(-10)-14/4
x2= -4/4=-1

s{ ( x1 = 6 e x2 = -1)}

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)