Сократите дроби :
16в/20в^4 ; 4х-16/х^2-16 ; 12у^3-8у^2/2-3y

16b/20bˇ4 = 4/5bˇ3(4x-16)/(xˇ2-16)=4(x-4)/(x+4)(x-4)=4/(x+4)(12yˇ3-8yˇ2)/(2-3y)=4yˇ2(3y-2)/(2-3y)=- 4yˇ2

16b / 20b⁴ = (4*4b) / (5*4b⁴) = 4/5b³(4x-16) / (x²-16) = 4(x-40) / ((x-4)(x+4) = 4/(x+4)(12y³-8y²) / (2-3y) = 4y²(3y-2)/ -1(3y-2)= - 4y²