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[tex]7( {x}^{2} - x) + {x}^{2} \\ 7 {x}^{2} - 7x + {x}^{2} \\ = 8 {x}^{2} - 7x \: \: \: \: [/tex]
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[tex]7( {x}^{2} - x) + {x}^{2} \\ 7 {x}^{2} - 7x + {x}^{2} \\ = 8 {x}^{2} - 7x \: \: \: \: [/tex]
Espero averte ayudado
todo completo plsss