Achar as raízes das equações: x2 - x - 20 = 0.... Pergunta de ideia deBeatingFlxwer

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Achar as raízes das equações: x2 - x - 20 = 0

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maximiano10oxxjez Aplicaremos Bhaskara, -b+-√b²-4ac/2a
+1+-√1²-4.1.20/2.1
+1+-√1+80/2
+1+-√81/2
+1+9/2=10/2=5 ; +1-9/2=-8/2=-4
X¹= 5
X²= -4
portanto as raízes desta equação são 5 e -4

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