(3m²-4)/8 - (2m+3)/12 = m/3 - 1/4

(3 * m² - 4)/8 - (2 * m + 3)/12 = m/3 - 1/4; 

(3 * m^2 - 4)/8 * 24 - (2 * m + 3)/12 * 24 = m/3 * 24 - 1/4 * 24; 

3 * (3 * m^2 - 4) - 2 * (2 * m + 3) = 8 * m - 6; 

3 * 3 * m^2 - 3 * 4 - 2 * 2 * m - 2 * 3 = 8 * m - 6; 

9 * m^2 - 12 - 4 * m - 6 = 8 * m - 6; 

9 * m^2 - 4 * m - 18 = 8 * m - 6; 

9 * m^2 - 4 * m - 18 - 8 * m + 6 = 0; 

9 * m^2 - 12 * m - 12 = 0; 

3 * (3 * m^2 - 4 * m - 4) = 0; 

3 * m^2 - 4 * m - 4 = 0; 

D = 16 - 4 * 3 * (- 4) = 16 + 48 = 64; 

m1 = (4 + 8)/6 = 12/6 = 2; 

m2 = (4 - 8)/6 = -4/6 = -2/3.