Question

X^2-2x-8=0
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Pra mim passar
Poxaaa

Answer 1

Resposta:

x²-2x-8=0

∆= b²-4ac

∆= (-2)²-4*1*(-8)

∆=4+32

∆= 36

x½= -b±√∆/2a

x½= 2±√36/2*1

x½= 2±6/2

x1= 2+6/2

x1= 4

x2=2-6/2

x2= -2

espero ter ajudado

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