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¿Cómo factorizar ?.
Aplicamos diferencia de cuadrados.
![\boxed{ a^{2}- b^{2}=(a+b)(a - b) } \boxed{ a^{2}- b^{2}=(a+b)(a - b) }](https://tex.z-dn.net/?f=%5Cboxed%7B+a%5E%7B2%7D-+b%5E%7B2%7D%3D%28a%2Bb%29%28a+-+b%29++%7D)
• a^2 - 4
![(a + 2)(a - 2) (a + 2)(a - 2)](https://tex.z-dn.net/?f=%28a+%2B+2%29%28a+-+2%29)
![=========================== ===========================](https://tex.z-dn.net/?f=%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D)
• 9 - b^2
![(3 + b)(3 - b) (3 + b)(3 - b)](https://tex.z-dn.net/?f=%283+%2B+b%29%283+-+b%29)
![============================ ============================](https://tex.z-dn.net/?f=%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D)
• 1 - 4m^2
![(1 + 2m)(1 - 2m) (1 + 2m)(1 - 2m)](https://tex.z-dn.net/?f=%281+%2B+2m%29%281+-+2m%29)
![========================== ==========================](https://tex.z-dn.net/?f=%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D)
• 16 - n^2
![(4 + n)(4 - n) (4 + n)(4 - n)](https://tex.z-dn.net/?f=%284+%2B+n%29%284+-+n%29)
Aplicamos diferencia de cuadrados.
• a^2 - 4
• 9 - b^2
• 1 - 4m^2
• 16 - n^2
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