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x ( x - 8) ≤ 6x^2 + 2x
x^2 - 8x ≤ 6x^2 + 2x
0 ≤ 6x^2 + 2x + 8x - x^2
0 ≤ 5x^2 + 10 x
si hacemos factor comun queda:
0 ≤ 5x ( x + 2)
entonces los valores que quedan son:
0 ≤ x y -2 ≤ x