Question

Y2 +4y - 5 igual a 0

Answer 1

Explicação passo-a-passo:

Y2 +4y - 5 =0

∆=b2-4.a.c

∆=(4)2-4.(1).(-5)

∆=16+20

∆=36

x'=-4+√36/2=-4+6/2=2/2= 1

x"=-4-√36/2=-4-6/2=-10/2=-5

S={-6,1}

ok!

Answer 2

Olá Gabrielle!

y² + 4y - 5 = 0

A= 1

B= 4

C= - 5

∆= b² - 4ac

∆= 4² - 4 • 1 • ( - 5)

∆= 16 + 20

∆= 36

y= - b ± √∆ / 2a

y= - 4 ± √36 / 2 • 1

y'= - 4 + 6/2 = 2/2 = 1

y''= - 4 - 6/2 = - 10/2 = - 5

S= ( 1 , - 5)