Question

(com delta)

A) x²-6x-16=0
B) x²-4x-12=0

Answer 1

Formula de Baskara.
Δ=b²-4a.c
Δ=6²-4.1.16
Δ=36+64
Δ=100

x=-b+-√Δ/2a
x=6+-√100/2.1
x=6+-10/2
x1=6+10/2=16/2=8
x2=6-10/2=-4/2=-2

Δ=4²-4.1.12
Δ=16+48
Δ=64

x=4+-√64/2
x=4+-8/2
x1=4+8/2=12/2=6
x2=4-8/2=-4/2=-2