Question

dada a funçao f(x)=-3*2-5x+2 determine f(-2), (-1/2),f(7),f(x)=0

Answer 1

F(x)=-3*2-5x+2
f(-2) = -3*2-5*(-2)+2
f(-2)= -6+10+2
f(-2)= 6

f(-1/2) = -3*2-5*(-1/2)+2
f(-1/2) = -6 +2,5+2
f(-1/2) = -1,5

f(7) = -3*2-5*(7)+2
f(7) = -6 - 40+2 
f(7) = -44

0 = -3*2-5x+2
5x= -4
x=-4/5