Respuesta:
x = 1 x = −5
x2 + 4x = 5 x2 + 4x = 5
(1)2 + 4(1) = 5 (−5)2 + 4(−5) = 5
1 + 4 = 5 25 ‒ 20 = 5
5 = 5 5 = 5
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Respuesta:
x = 1 x = −5
x2 + 4x = 5 x2 + 4x = 5
(1)2 + 4(1) = 5 (−5)2 + 4(−5) = 5
1 + 4 = 5 25 ‒ 20 = 5
5 = 5 5 = 5