Respuesta:
( x + 7 ) a + x ( x + 7 ) + 3 ( x + 7 )
( x + 7 ) a + ( x + 7 ) x + 3 ( x + 7 )
( x + 7 ) a + ( x + 7 ) x + ( x + 7 ) ⋅ 3
( x + 7 ) ( a + x ) + ( x + 7 ) ⋅ 3
( x + 7 ) ( a + x + 3 )
Rpta: ( x + 7 ) ( a + x + 3 )
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Respuesta:
( x + 7 ) a + x ( x + 7 ) + 3 ( x + 7 )
( x + 7 ) a + ( x + 7 ) x + 3 ( x + 7 )
( x + 7 ) a + ( x + 7 ) x + ( x + 7 ) ⋅ 3
( x + 7 ) ( a + x ) + ( x + 7 ) ⋅ 3
( x + 7 ) ( a + x + 3 )
Rpta: ( x + 7 ) ( a + x + 3 )