в). 3x² + 5x - 2 = 3(x - 1/3)(x + 2) = (3x - 1)(x+ 2);

    3x² + 5x - 2 = 0        D = b²-4ac = 25+24 = 49

    x₁ = (-b+√D)/2a = (-5+7)/6 = 1/3

    x₂ = (-b-√D)/2a = (-5-7)/6 = -2        

г). 6x² - 13x + 6 = 6(x - 1,5)(x - 2/3) = (2x - 3)(3x - 2);

    6x² - 13x + 6 = 0         D = b²-4ac = 169-144 = 25

    x₁ = (-b+√D)/2a = (13+5)/12 = 1,5

    x₂ = (-b-√D)/2a = (13-5)/12 = 2/3        

Verified answer

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