Question

Resolva a equação y = 2x²-1x-3 usando a Fórmula de Bháskara. *
A) 3/2 E -1
B) 5/3 E 1
C) 2/3 E -2
D) 3/5 E 3
E) 1/2 E 1

Answer 1

Resposta:

2x²-8x=24

2x²-8x-24=0

Δ=b²-4.a.c

Δ=(-8)²-4.2.(-24)

Δ= 64+192

Δ=256

x=-b+/- √Δ/2.a

x'= -(-8) +√256/2.2

x'= 8+16/4

x'=24/4

x'=6

x"= -(-8) -16/4

x"=+8-16/4

x"=-8/4⇒x"=-2 S{6,-2}