Question

упростить выражения (5a:3b:2):4*20a:2b

Answer 1

$(5a:3b:2) :4*20a:2b =( frac{5a}{3b} * frac{1}{2} )* frac{1}{4} *20a* frac{1}{2b} = \ \ = frac{5a}{3b*2} * frac{20a}{4*2b} = frac{5a}{6b} * frac{5a}{2b} = frac{(5a)^2}{6b*2b} = frac{25a^2}{12b^2}$