@Carl Love 

Thank you for your support,

Yes each variable in the equation is divided by one common value,which is one threshold value,therefore all values must be less than one,Please help me sir what to do now? if i get some value greater than one by using fsolve, that solution is not meaningful.if i get t4 and t8 negative and all values less than one then there is some hope in my solution

@Carl Love 

Thank you for your support,

Yes each variable in the equation is divided by one common value,which is one threshold value,therefore all values must be less than one,Please help me sir what to do now? if i get some value greater than one by using fsolve, that solution is not meaningful.if i get t4 and t8 negative and all values less than one then there is some hope in my solution

@Carl Love In my expected solution always t4 and t8 must be negative i e less than zero can we use these inequalities but they are only two,what about third? the expected value of t2 may be negative or positive,can we use this equality also, assuming t2 as negative, that means according to you we will have additional three more equations.

My all values must be less than one because i have normalised all the terms,

thnk you,

@Carl Love In my expected solution always t4 and t8 must be negative i e less than zero can we use these inequalities but they are only two,what about third? the expected value of t2 may be negative or positive,can we use this equality also, assuming t2 as negative, that means according to you we will have additional three more equations.

My all values must be less than one because i have normalised all the terms,

thnk you,

Thnku for your support.like these equations i have total 12 equations,i tried to solve that equations using solve command,but i got the solution in Root of format containing cmplex,i know nothing about that root of also i used fsolve command, i got the solution but all the values i got are not feasible for my work.Here are that equations

eq_1 := -t7+c1-c2-vc+.117 = 0;

eq_2 := -t4+c2+c3 = .177;

eq_3 := -t8+t4+c4-c3+vc = 0;

eq_4 := t7+t8-c1-c4+0.6e-1 = 0;

eq_5 := -t5-t1+.9*c1+.9*c2 = .103;

eq_6 := t1-t2-.9*c2+.9*c3-1.385*vc = 0;

eq_7 := t2+t6-.9*c3-.9*c4+1.385*vc+.103 = 0;

eq_8 := t5-t6-.9*c1+.9*c4 = 0;

eq_9 := -70*t1+70*t5+60*t7-181.143*c1+181.143*c1^2+181.143*c2^2+450*vc = 7.02;

eq_10 := 70*t1-70*t2-60*t4-181.143*c2^2+181.143*c3-181.143*c3^2-900*vc+7.02 = 0;

eq_11 := 70*t2+60*t4-70*t6-60*t8-181.143*c3+181.143*c3^2+181.143*c4^2+450*vc = 0;

eq_12 := -70*t5+70*t6-60*t7+60*t8+181.143*c1-181.143*c1^2-181.143*c4^2 = 0;

solve({eq_1, eq_10, eq_11, eq_12, eq_2, eq_3, eq_4, eq_5, eq_6, eq_7, eq_8, eq_9}, {c1, c2, c3, c4, t1, t2, t4, t5, t6, t7, t8, vc});

please help me,,,

can i get the real and feasible solution, as we observe the Root of terms,i think it seems to be non solvable, i am anware about these mathematical concepts.Please help me

Thnku for your support.like these equations i have total 12 equations,i tried to solve that equations using solve command,but i got the solution in Root of format containing cmplex,i know nothing about that root of also i used fsolve command, i got the solution but all the values i got are not feasible for my work.Here are that equations

eq_1 := -t7+c1-c2-vc+.117 = 0;

eq_2 := -t4+c2+c3 = .177;

eq_3 := -t8+t4+c4-c3+vc = 0;

eq_4 := t7+t8-c1-c4+0.6e-1 = 0;

eq_5 := -t5-t1+.9*c1+.9*c2 = .103;

eq_6 := t1-t2-.9*c2+.9*c3-1.385*vc = 0;

eq_7 := t2+t6-.9*c3-.9*c4+1.385*vc+.103 = 0;

eq_8 := t5-t6-.9*c1+.9*c4 = 0;

eq_9 := -70*t1+70*t5+60*t7-181.143*c1+181.143*c1^2+181.143*c2^2+450*vc = 7.02;

eq_10 := 70*t1-70*t2-60*t4-181.143*c2^2+181.143*c3-181.143*c3^2-900*vc+7.02 = 0;

eq_11 := 70*t2+60*t4-70*t6-60*t8-181.143*c3+181.143*c3^2+181.143*c4^2+450*vc = 0;

eq_12 := -70*t5+70*t6-60*t7+60*t8+181.143*c1-181.143*c1^2-181.143*c4^2 = 0;

solve({eq_1, eq_10, eq_11, eq_12, eq_2, eq_3, eq_4, eq_5, eq_6, eq_7, eq_8, eq_9}, {c1, c2, c3, c4, t1, t2, t4, t5, t6, t7, t8, vc});

please help me,,,

can i get the real and feasible solution, as we observe the Root of terms,i think it seems to be non solvable, i am anware about these mathematical concepts.Please help me