Necesito desarrollar el ejercicio 119 del algebra del 1 al 7?

Aqui van las soluciones :

<img src="https://tex.z-dn.net/?f=1%29%203ab%2F2%20a%5E%7B2%7Dx%2B2%20a%5E%7B3%7D%20%3D3ab%2F2%20a%5E%7B2%7D%28x%2Ba%29%3D3b%2F2a%28x%2Ba%29%3D3b%20%2F2a%28x%2Ba%29%20%20%5C%5C%20%20%5C%5C%202%29%0Axy%2F3%20x%5E%7B2%7D%20-3x%20y%5E%7B2%7D%3Dxy%2F3xy%28x-y%29%3D1%2F3%28x-y%29%20%5C%5C%20%20%5C%5C%203%292ax%2B4bx%2F3ay%2B6by%3D2x%28a%2B2b%29%2F3y%28a%2B2b%29%3D2x%2F3y%20%5C%5C%20%20%5C%5C%204%29%20x%5E%7B2%7D%20-2x-3%2Fx-3%3D%28x-3%29%28x%2B1%29%2F%28x-3%29%3D%28x%2B1%29%20%5C%5C%20%20%5C%5C%205%2910%20a%5E%7B2%7D%20%20b%5E%7B3%7Dc%2F8%20a%5E%7B3%7D-8%20a%5E%7B2%7Db%3D%20a%5E%7B2%7D%20b%5E%7B3%7Dc%2F8%20a%5E%7B2%7D%28a-b%29%3D%20b%5E%7B3%7Dc%2F8%28a-b%29%20%5C%5C%20%20%5C%5C%206%29%20x%5E%7B2%7D%20-4%2F5ax%2B10a%3D%28x%2B2%29%28x-2%29%2F5a%28x%2B2%29%20%3D%28x-2%29%2F5a%20%5C%5C%20%20%5C%5C%207%29%203%20x%5E%7B2%7D%20-4x-15%2F%20x%5E%7B2%7D%20-5x%2B6%3D%20%283x%29%5E%7B2%7D-4%283x%29-45%2F%20x%5E%7B2%7D%20-5x%2B6%20%5C%5C%20%20%5C%5C%20%3D%5Cfrac%7B%5B%283x-9%29%283x%2B5%29%5D%20%7D%7B3%7D%20%2F%28x-3%29%28x-2%29%3D%28x-3%29%283x%2B5%29%2F%28x-3%29%28x-2%29%20%5C%5C%3D3x%2B5%2Fx-2%0A" />.