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+ * + = +
+ * - = -
Ley de signos de la resta :
- * + = -
- * - = +
Nota : Los signos iguales da un positivo, los signos de diversas formas da un numero negativo
Positivo : + * += + Negativo : - * + = -
Con gusto : Juanmanuel121 :)
+x-=-
+x+=+
-x-=+