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entonces resolvemos para x1 y x2
8x^2 - 16x = 6x + 7
8x^2 -16x -6x -7 = 0
8x^2 -22x -7 =0
aplicamos la formula general
{-b ⁺₋ √(b² - 4ac)} / 2a
x1 = [-(-22) + √(-22)² 4*8*(-7)] / 2*(8) = 3.03
x2= [-(-22) - √(-22)² 4*8*(-7)] / 2*(8) = -0.288
si quieres expresarle en fracciones se multiplica y se divide para múltiplos del 10
x1=3.03*100/100 =303/100
x2= -0.288*1000/1000 = - 288/1000 simplificando - 36/125
x1=303/100
x2= - 36/125