Question

calcule as raizes das equaçoes do 2 Grau . -x²-8x-7=0?

Answer 1

a= -1 b= -8 c = -7

b^2-4ac
(-8)^2-4. (-1). (-7)
64 -28= 36

[-(-8) + 6] /-2
(64+6)/-2
70/-2= -35

[-(-8) - 6]/-2
(64-6)/-2
58/-2= -29

Answer 2

Resposta:

ola

vamos lá

+x²-8x-7=0

a= -1

b= -8

c= -7

∆= b²-4.a.c

∆= (-8)²-4.(-1).-7

∆= 64-28

∆= 36

x= -b±√∆/2.a

x= -(-8)±√36/2.(-1)

x= 8±6/-2

x1= 8+6/-2

x1= 14/-2

x1= -7

x2= 8-6/-2

x2= 2/-2

x2= -1

s{-7,-1)

bons estudos