Question Number 61027 by Gulay last updated on 28/May/19
Commented by Gulay last updated on 28/May/19
$$\mathrm{sir}\:\mathrm{could}\:\mathrm{you}\:\mathrm{help}\:\mathrm{me} \\ $$
Commented by mathsolverby Abdo last updated on 28/May/19
$$=\left\{\left(\mathrm{1}+{i}\right)\left(\mathrm{1}−{i}\right)\right\}^{\mathrm{7}} =\left(\mathrm{1}−{i}^{\mathrm{2}} \right)^{\mathrm{7}} =\mathrm{2}^{\mathrm{7}} \\ $$
Commented by Gulay last updated on 28/May/19
$$\mathrm{thank}\:\mathrm{you}\:\mathrm{sir} \\ $$