Question

resolva as equações do 2°grau sendo U=R -×^2+6×-5=0

Answer 1

Olá.

• -x² + 6x - 5 = 0

Δ = 6² - 4(-1)(-5)
Δ = 36 - 20
Δ = 16

x = -6 +- 4 / -2

x1 = -6 - 4 / -2 = 5
x2 = -6 + 4 / -2 = 1

S = {1, 5}

Bons estudos.

Answer 2

U=R

-x² +6x -5 =0

a=-1
b=6
c=-5

Δ=b²-4ac
Δ=6²-4(-1)(-5)
Δ=36-4(+5)
Δ=36-20
Δ=16

x=(-b±√Δ)/2a= (-6±√16)/2(-1)=(-6±4)/-2

x'=(-6+4)/-2=-2/-2=+1

x"=(-6-4)/-2=-10/-2=+5

S={1 ,5}