Respuesta:
X^2+5X-9 = 5
X^2+5X-9+9 = 5+9
X^2+5X = 14
X^2+5X-14 = 14-14
X^2+5X-14 = 0
X^2-2X+7X-14 = 0
X(X-2)+7(X-2) = 0
( X-2 ) ( X+7 ) = 0
X1 = 2 y X2 = -7
Explicación paso a paso:
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Respuesta:
X^2+5X-9 = 5
X^2+5X-9+9 = 5+9
X^2+5X = 14
X^2+5X-14 = 14-14
X^2+5X-14 = 0
X^2-2X+7X-14 = 0
X(X-2)+7(X-2) = 0
( X-2 ) ( X+7 ) = 0
X1 = 2 y X2 = -7
Explicación paso a paso: