Question

menos x ao quadrado mais x 12 =0
$- x {2} + x + 12 = 0$
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Answer 1

a= -1 b= 1 c=12

∆=b^2-4ac

∆= 1^2-4.(-1).12

∆= 1 + 48

∆= 49

x= -b+-√∆/2a

x= -1+-√49/2.1

x= - 1 +-7/2

x'= -1 +7/2

x'= 6/3 =2

x" = -8/2 = -4

s = {2,-4}