Question

resolva pela forma de bhaskara

a) x²-4x-12=0

Answer 1

x² - 4x - 12 = 0
a=1, b=-4, c=-12
Δ = (-4)² -4 · 1 · (-12)
Δ = 16 + 48
Δ = 64

x' = 4 + √64 / 2 · 1
x' = 4 + 8 / 2
x' = 12 / 2
x' = 6

x" = 4 - 8 / 2
x" = -4 / 2
x" = -2

Answer 2

achando delta
delta= b²-4ac
4²-4.1.(-12)
16+48
=64

fórmula de bhaskara: -b+ou-√delta/2a
-4+ou-(raiz de 64=8)/2

x'=-4+8/2
x'=4/2
x'=2

x''=-4-8/2
x''=-12/2
x''=-6