Question

o problema de algebraa clasa a 8 a pt aşi si maiestri ..va rooog dau corana ...problema 36

Answer 1

f(x)=(m-3)x+2n+1
A(-1,2) ∈ graficului f(x) daca f(-1)=2 -m+3+2n+1=2, -m+2n=-2, m-2n=2
B(2,5) ∈ graficului f(x) daca f(2)=2(m-3)+2n+1=5, 2m-6+2n+1=5,
2m+2n=10, m+n=5
m-2n=2
m+n=5
adunam relatiile
2m=7, m=7/2, n=9