Question

Se a= 1 ,b= -3 e c= -4


-b+√b^2 - 4ac
2a

Answer 1

∆=9+16
∆=25

x= 3±√25
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2
x=3±5
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2

x1
3+5=8= 4
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2

x2= 3-5= -2= -1
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2