Question

arata ca numarul a=2^5-2^3-2^3-2^3 este cubul unui nr natural

Answer 1

${2}^{5} - {2}^{3} - {2}^{3} - {2}^{3} = {2}^{3} ( {2}^{2} - 1 - 1 - 1) = {2}^{3} (4 - 1 - 1 - 1) = {2}^{3} (4 - 3) = {2}^{3} \times 1 = {2}^{3}$