emmanuel122 emmanuel122
  • 30-05-2021
  • Mathematics
contestada


1. María expandió el siguiente cuadrado de la manera que sigue: (x+3)2 = x² + 9,
¿Está correcta la forma que usó María?

Respuesta :

blackshades
blackshades blackshades
  • 30-05-2021

Answer:

La expansión de María

[tex](x + 3) {}^{2} = x {}^{2} + 9[/tex]

Correcta expansión

[tex](x + 3) {}^{2} \\ = {x}^{2} + 2 \times x \times 3 + 3 {}^{2} \\ = x {}^{2} + 6x + 9[/tex]

Note - (a + b)² = a² + 2ab + b²

✐ La expansión de Mary está mal. Correcta expansión ⇻ x² + 6x + 9

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