Como se factoriza esta parte?

1) <img src="https://tex.z-dn.net/?f=%20a%5E%7B2%7D%20%2B2ab%2Bb%5E%7B2%7D-%20x%5E%7B2%7D%20tenemos%20un%20trinomio%20cuadrado%20perfecto%20en%5C%5C%20%0A%28a%2Bb%29%5E%7B2%60%7D-%20x%5E%7B2%7D%20...Factoramos%20como-dif.de.cuadrado%20%5C%5C%20%0A%28a%2Bb%2Bx%29%28a%2Bb-x%29" />

2, )Factorizamos el trinomio

<img src="https://tex.z-dn.net/?f=%28a-b%29%5E%7B2%7D-9%20%20factoriza%20dif%20de%20cuadrado%20%5C%5C%20%0A%28a-b%2B3%29%28a-b-3%29" />

3)Factoriza el trin.

Cuad.

Perf.

(m + 2n) ^ {2} - a ^ {2}

<img src="https://tex.z-dn.net/?f=%28m%2B2n%2Ba%29%28m%2B2n-a%29" />

4)<img src="https://tex.z-dn.net/?f=%283a%2B2m%29%5E%7B2%7D-25%20x%5E%7B2%7D%20" />

<img src="https://tex.z-dn.net/?f=%283a%2B2m%2B5x%29%283a%2B2m-5x%29" />

5)<img src="https://tex.z-dn.net/?f=m%5E%7B2%7D-%28a%5E%7B2%7D%2B2ab%2Bb%5E%7B2%7D%29%20%5C%5C%20%0Am%5E%7B2%7D-%28a%2Bb%29%5E%7B2%7D%20%5C%5C%20%0A%28m%2Ba%2Bb%29%28m-a-b%29" />.