Question

aflati valoarea expresiei m+3n+8p stiind ca m+n=-5,3 si n+4p= 12,4

Answer 1

Scriem expresia m+3n+8p ca fiind m+n+2n+8p ,respectiv m+n+2(n+4p).Astfel inlocuim in relatia rezultata datele oferite de problema. -5,3+2*12,4=19,5 .

Answer 2

m+n=-5,3=>m=-5,3-n n+4p=12,4=>n=12,4-4p Daca n=12,4-4p si m=-5,3-n=>m=-5,3-(12,4-4p)=>m=-5,3-12,4+4p=>m=-17,7+4p Acum m+3n+8p=-17,7+4p+ 3•(12,4-4p)+8p=-17,7+4p+37,2-12p+8p=19,5