Question

x²-16x-80=0 resposta

Answer 1

Delta= b²-4ac
Delta= (-16)²-4.1.(-80)
Delta= 256+320
Delta= 576

x= -b+-√delta/2a
x= -(-16)+-√576/2.1
x= 16+-24/2   simplificando, se divide por 2
x= 8 +-12
Logo:
x'= 8+12
x'= 20

x"= 8-12
x"= -4

Espero ter ajudado :)

Answer 2

Δ = b2 - 4ac
Δ  = 256+320=576

X = 16+/- 24 / 2=
x'= 40/2 = 20
x"= -8/2 = -4