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3x² + 7x + 4 = 0
Observa que: 7x = 3x + 4x , entonces:
3x² + 3x + 4x + 4 = 0
3x(x+1) + 4(x+1) = 0
(3x+4)(x+1) = 0
• 3x+4 = 0 → x = -4/3
• x+1 = 0 → x = -1
Solución: x= {-4/3,-1}
Saludos! Jeizon1L