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(a + 5)² = a² + 5² es verdadero o falso ?

(a + 5)² = a² + 5² es verdadero o falso ?

En resumen

<img src="https://tex.z-dn.net/?f=%28a%2B5%29%5E2%3D%28a%2B5%29%2A%28a%2B5%29%3D%28a%2B5%29%2Aa%2B%28a%2B5%29%2A5%3D%20%5C%5C%20%3Da%5E2%2B5a%2B5a%2B5%5E2%3Da%5E2%2B2%2A5a%2B5%5E2%3D" /> Es falso, ya que falta el término 2 * 5a.

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<img src="https://tex.z-dn.net/?f=%28a%2B5%29%5E2%3D%28a%2B5%29%2A%28a%2B5%29%3D%28a%2B5%29%2Aa%2B%28a%2B5%29%2A5%3D%20%5C%5C%20%3Da%5E2%2B5a%2B5a%2B5%5E2%3Da%5E2%2B2%2A5a%2B5%5E2%3D" />

Es falso, ya que falta el término 2 * 5a.