I want to know how to solve problem using backtracking line search. So plz solve this function using backtracking line search method, not python. f$($x$)=2$x$1$x$2+$x$2-$x$1^2-2$x$2^2.($x$1,$x$2)=(1,1),$ t$=1,$ alpha$=1,$ beta$=0\mathrm{.}8,$ E$=0\mathrm{.}25$