Son ejercicios de factorización quien me ayuda con los procedimientos por favor​?

Respuesta : <img src="https://tex.z-dn.net/?f=1%293ab%5E2%5Cleft%28a%2B5-15b%5Cright%29" /><img src="https://tex.z-dn.net/?f=2%29%5Cleft%28x%2B3%5Cright%29%5Cleft%28b%2B5%5Cright%29" /><img src="https://tex.z-dn.net/?f=3%29%5Cleft%28x-1%5Cright%29%5Cleft%28a-1%5Cright%29" /><img src="https://tex.z-dn.net/?f=4%29%5Cleft%28x%2B3%5Cright%29%5Cleft%28x%2B4%5Cright%29" /><img src="https://tex.z-dn.net/?f=5%29%5Cleft%28x%2B3%5Cright%29%5Cleft%28x-5%5Cright%29" /><img src="https://tex.z-dn.net/?f=6%29%5Cleft%284x%2B3y%5Cright%29%5Cleft%284x-3y%5Cright%29" /><img src="https://tex.z-dn.net/?f=7%29%5Cleft%285a%2B2%5Cright%29%5Cleft%2825a%5E2-10a%2B4%5Cright%29" />Explicación paso a paso : <img src="https://tex.z-dn.net/?f=3a%5E2b%5E2%2B15ab%5E2-45ab%5E3%5C%5C%5C%5C%5Cmathrm%7BAplicar%5C%3Alas%5C%3Aleyes%5C%3Ade%5C%3Alos%5C%3Aexponentes%7D%3A%5Cquad%20%5C%3Aa%5E%7Bb%2Bc%7D%3Da%5Eba%5Ec%5C%5C%5C%5Cab%5E3%3Dab%5E2b%2C%5C%3Aa%5E2b%5E2%3Daab%5E2%5C%5C%5C%5C%3D3aab%5E2%2B15ab%5E2-45ab%5E2b%5C%5C%5C%5C%5Cmathrm%7BReescribir%5C%3A%7D-45%5Cmathrm%7B%5C%3Acomo%5C%3A%7D15%5Ccdot%20%5C%3A3%5C%5C%5C%5C%5Cmathrm%7BReescribir%5C%3A%7D15%5Cmathrm%7B%5C%3Acomo%5C%3A%7D5%5Ccdot%20%5C%3A3%5C%5C%5C%5C%3D3aab%5E2%2B5%5Ccdot%20%5C%3A3ab%5E2%2B5%5Ccdot%20%5C%3A3%5Ccdot%20%5C%3A3ab%5E2b%5C%5C%5C%5C%5Cmathrm%7BFactorizar%5C%3Ael%5C%3Atermino%5C%3Acomun%5C%3A%7D3ab%5E2%5C%5C%5C%5C%3D3ab%5E2%5Cleft%28a%2B5-15b%5Cright%29" /><img src="https://tex.z-dn.net/?f=15%2B5x%2B3b%2Bxb%5C%5C%5C%5C%3D%5Cleft%285x%2B15%5Cright%29%2B%5Cleft%28xb%2B3b%5Cright%29%5C%5C%5C%5C%5Cmathrm%7BFactorizar%5C%3A%7Db%5Cmathrm%7B%5C%3Ade%5C%3A%7Dxb%2B3b%5Cmathrm%7B%3A%5Cquad%20%7Db%5Cleft%28x%2B3%5Cright%29%5C%5C%5C%5C%5Cmathrm%7BFactorizar%5C%3A%7D5%5Cmathrm%7B%5C%3Ade%5C%3A%7D5x%2B15%5Cmathrm%7B%3A%5Cquad%20%7D5%5Cleft%28x%2B3%5Cright%29%5C%5C%5C%5C%3Db%5Cleft%28x%2B3%5Cright%29%2B5%5Cleft%28x%2B3%5Cright%29%5C%5C%5C%5C%5Cmathrm%7BFactorizar%5C%3Ael%5C%3Atermino%5C%3Acomun%5C%3A%7Dx%2B3%5C%5C%5C%5C%3D%5Cleft%28x%2B3%5Cright%29%5Cleft%28b%2B5%5Cright%29" /><img src="https://tex.z-dn.net/?f=a%5Cleft%28x-1%5Cright%29%2B1-x%5C%5C%5C%5C%5Cmathrm%7BExpandir%7D%5C%3Aa%5Cleft%28x-1%5Cright%29%3A%5Cquad%20ax-a%5C%5C%5C%5C%3Dax-a%2B1-x%5C%5C%5C%5C%5Cmathrm%7BFactorizar%5C%3A%20el%5C%3A%20polinomio%7D%3A%5C%5C%5C%5C%3D%5Cleft%28x-1%5Cright%29%5Cleft%28a-1%5Cright%29" />[img = 10][img = 11][img = 12][img = 13].