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$frac{(2x+1)^2}{25} + frac{x-1}{3} =x 3(2x+1)^2+25(x-1)=75x 3(4x^2+4x+1)+25x-25-75x=0 12x^2+12x+3+25x-25-75x=0 12x^2-38x-22=0 6x^2-19x-11=0 D=361+264=625 x_1= frac{19+25}{12} = frac{44}{12}= frac{11}{3} x_2= frac{19-25}{12} = -frac{6}{12}= -0.5$

$frac{(3x+2)^2}{11} - frac{x+5}{4} =x^2 4(3x+2)^2-11(x+5)=44x^2 4(9x^2+12x+4)-11x-55-44x^2=0 36x^2+48x+16-11x-55-44x^2=0 -8x^2+37x-39=0 8x^2-37x+39=0 D=1369-1248=121 x_1= frac{37+11}{16}=3 x_2= frac{37-11}{16}=frac{26}{16}=frac{13}{8}$

$frac{(2-x)^2}{3} - 2x=frac{(7+2x)^2}{5} 5(2-x)^2-30x=3(7+2x)^2 5(4-4x+x^2)-30x=3(49+28x+4x^2) 20-20x+5x^2-30x-147-84x-12x^2=0 -7x^2-134x-127=0 7x^2+134x+127=0 D_1=4489-889=3600 x_1= frac{-67-60}{7} =-frac{-127}{7} x_2= frac{-67+60}{7} =-1$

$frac{(6-x)^2}{8} +x=7- frac{(2x-1)^2}{3} 3(6-x)^2+24x=168-8(2x-1)^2 3(36-12x+x^2)+24x=168-8(4x^2-4x+1) 108-36x+3x^2+24x-168+32x^2-32x+8 35x^2-44x-52=0 D_1=484+2030=2304 x_1= frac{22+48}{35} =2 x_2= frac{22-48}{35} =- frac{26}{35}$