Question

$m^{2}x+3m-x= m^{2}+2$
are solutia x=5

Answer 1

daca x=5 solutie atunci trebuie sa inlocuim in ecuatie
5m²+3m-5=m²+2
4m²+3m-7=0
Δ=9+112=121
m1,2=(-3+/-11)/8
m1=(-3-11)/8=-14/8=-7/4
m2=(-3+11)/8=8/8=1
acum depinde de cerinta ce ai ca soltie