Question

resolva as equações do segundo grau me ajudem Por favor obg quem me ajudar em todas ou quem me ajudar em uma

Answer 1

a)S=-10+3t+t²
a=1
b=3
c=-10

Δ=b²-4.a.c
Δ=3²-4.1.(-10)
Δ=9+40
Δ=49

x¹=-3+7/2=2
x²=-3-7/2=-5

b)S=-15-2t+t²
a=1
b=-2
c=-15

Δ=b²-4.a.c
Δ=-2²-4.1.(-15)
Δ=4+60
Δ=64

x¹=+2+8/2=5
x²=+2-8/2=-3

c)S=-8+2t+t²
a=1
b=2
c=-8

Δ=b²-4.a.c
Δ=2²-4.1.(-8)
Δ=4+32
Δ=36

x¹=-2+6/2=2
x²=-2-6/2-4

d)S=-40+3t+t²
a=1
b=3
c=-40

Δ=b²-4.a.c
Δ=3²-4.1.(-40)
Δ=9+160
Δ=169

x¹=-3+13/2=5
x²=-3-13/2=8

e)S=-28+3t+t²
Δ=b²-4.a.c
Δ=3²-4.1.(-28)
Δ=9+112
Δ=121
x¹=-3+11/2=4
x²=-3-11/2=-7

f)S=-20-t+t²
Δ=b²-4.a.c
Δ=-1²-4.1.(-20)
Δ=1+80
Δ=81
x¹=+1+9/2=5
x²=+1-9/2=-4

g)S=-36+6t+2t²
Δ=b²-4.a.c
Δ=6²-4.2.(-36)
Δ=36+288
Δ=324
x¹=-6+18/4=3
x²=-6-18/4=-6

h)S=-21-4t+t²
Δ=b²-4.a.c
Δ=-4²-4.1.(-21)
Δ=16+84
Δ=100
x¹=+4+10/2=7
x²=+4-10/2=-3

i)S=-18+7t+t²
Δ=b²-4.a.c
Δ=7²-4.1.(-18)
Δ=49+72
Δ=121
x¹=-7+11/2=2
x²=-7-11/2=-9

j)S=-130-3t+t²
Δ=b²-4.a.c
Δ=-3²-4.1.(-130)
Δ=9+520
Δ=529
x¹=+3+23/2=13
x²=+3-23/2=-10

Espero ter ajudado!