Question

formula de Bhaskara com delta

menos X elevado a 2 menos X + 30 = 0

Answer 1

-x²-x+30=0

a=-1
b=-1
c=30

Δ=b²-4*a*c
Δ=(-1)²-4*(-1)*30
Δ=1+120
Δ=121

x=-b+-√Δ/2a
x=-(-1)+-√121/2*(-1)
x=1+-11/-2

x'=1+11/-2
x'=12/-2
x'=-6

x"=1-11/-2
x"-10/-2
x"=5

Espero ter ajudado!