Question

atraves da formula de bhaskara encontre as raizes das equaçoes: 8x²+2x-1=0

Answer 1

8x²+2x-1=0
a=8 b=2 c=-1
 Δ= b²-4.a.c
Δ=2.2-4.8.(-1)
Δ=4.32
Δ=128

x=-b ±√Δ/2.a
x1= -2  +√128/2.8
x1=-2 +²√2²  +2²  +2² +2/16  (corta os 2 de dentro da raiz)
x1=-2+2.2.2√2/2.8
x1=-2+8√2/16(soma)
x1=6√2/16(simplifica por 2)
x1=3√2/8 

x2=-2-√128/2.8
x2=-2-²√2²  +2²  +2² +2/16  (corta os 2 de dentro da raiz)
x2=-2-2.2.2√2/2.8
x2=-2-(8)√2/16 (soma)
x2=-10√2/16(simplifica por 2)
x2=-5√2/8