Question Number 97236 by bemath last updated on 07/Jun/20
Commented by mr W last updated on 07/Jun/20
$${if}\:{you}\:{put}\:{several}\:{questions}\:{in}\:{one} \\ $$$${post},\:{please}\:{number}\:{the}\:{questions}! \\ $$
Commented by bemath last updated on 07/Jun/20
$$\mathrm{hahaha}…\mathrm{sorry}\:\mathrm{sir} \\ $$
Commented by bemath last updated on 07/Jun/20
$$\mathrm{thank}\:\mathrm{you}\:\mathrm{for}\:\mathrm{all} \\ $$
Answered by john santu last updated on 07/Jun/20
Commented by mahdi last updated on 07/Jun/20
$$\mathrm{in}\:\:\mathrm{case}\left(\mathrm{2}\right)\Rightarrow\mathrm{x}+\mathrm{y}=−\mathrm{2}\wedge\mathrm{xy}=−\mathrm{1} \\ $$$$\mathrm{but}\:\mathrm{xy}=\left(−\mathrm{1}−\sqrt{\mathrm{3}}\right)\left(−\mathrm{1}+\sqrt{\mathrm{3}}\right)=\mathrm{1}−\mathrm{3}=\mathrm{2}??? \\ $$
Answered by mahdi last updated on 19/Jun/20