Respuesta:
Explicación paso a paso:
x^2 + 3x = 28
x^2 + 3x - 28 = 0
Factorizando:
(x + 7)(x - 4) = 0
Igualando cada factor a cero:
x + 7 = 0
x = - 7
x - 4 =0
x = + 4
C.S. = {- 7; + 4}
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Respuesta:
Explicación paso a paso:
x^2 + 3x = 28
x^2 + 3x - 28 = 0
Factorizando:
(x + 7)(x - 4) = 0
Igualando cada factor a cero:
x + 7 = 0
x = - 7
x - 4 =0
x = + 4
C.S. = {- 7; + 4}