Question

-x²+x+12=0
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pra hoje​

Answer 1

- x² + x + 12 = 0

A= - 1

B= 1

C= 12

∆= b² - 4ac

∆= 1² - 4 • ( - 1) • 12

∆= 1 + 48

∆= 49

x= - b ± √∆ /2

x= - 1 ± √49/2

x= - 1 ± 7/2

x'= - 1 + 7/2 = 6/2 = 3

x''= - 1 - 7/2 = - 8/2 = - 4

S= (- 4 , 3)