Question

Equação do 2 grau
2 x elevado a 2 -6x-20=0
X elevado a 2 +x-20=0

Answer 1

2x^2-6x-20=0
delta=b^2-4.a.c
delta=(-6)^2-4.2.(-20)
delta=36+160
delta=196
x=-b-/+ raiz de delta/2a
x=-(-6)-14/2.2
x=6-14/4
x=-8/4
x=-2
x=-(-6)+14/2.2
x=6+14/4
x=20/4
x=5
x^2+x-20=0
delta=b^2-4.a.c
delta=1^2-4.1.(-20)
delta=1+80
delta=81
x=-b-/+ raiz de delta/2a
x=-1-9/2.1
x=-10/2
x=-5
x=-1+9/2.1
x=8/2
x=4

Answer 2

2x elevado a 2 -6x-20=0

Δ=b2-4ac

Δ=(-6) elevado a 2-4.2.(-20)

Δ=36+160

Δ=196

x=-b+-√Δ / 2a

x=6+-14 /4

x1=6+14/4= 20/4=5

x2=6-14/4= -8/4=-2

x elevado a 2+x-20=0

Δ=b2-4ac

Δ=1 elevado a 2-4.1.(-20)

Δ=1+80

Δ=81

x=-b+-√Δ / 2a

x=-1+-9 /2

x1= -1+9/2= 8/2=4

x2=-1-9/2= -10/2=-5