Question

${2}^{22} - {2}^{21} + {2}^{18}$
Sa fie pătrat perfect
va rog mult.​

Answer 1

${2}^{22} - {2}^{21} + {2}^{18} = {2}^{18} \times ( {2}^{4} - {2}^{3} + 1 ) = {2}^{18} \times (16 - 8 + 1) = {2}^{18} \times 9 = {2}^{18} \times {3}^{2} = ({2}^{ {9})^{2} } \times {3}^{2} = { ({2}^{9} \times 3) }^{2}$

este patrat perfect