Question

$x {}^{2} - 6x - 16 = 0$
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Answer 1

Resposta:

$(x-8)*(x+2)=0\\x-8=0\\x=8\\\\x+2=0\\x=-2\\\\S(8,-2)$

Explicação passo-a-passo:

Answer 2

Olá Ester!

x² - 6x - 16 = 0

A= 1

B= - 6

C= - 16

∆= b² - 4ac

∆= ( - 6)² - 4 • 1 • ( - 16)

∆= 36 + 64

∆= 100

x= - b±√∆ /2a

x= - ( - 6) ± √100 / 2 • 1

x'= 6 + 10/2 = 16/2 = 8

x''= 6 - 10/2 = - 4/2 = - 2

S= ( 8 , - 2)