Question

Dada a função de, tal que f(x) =-x2+ 5x+6, calcule: x para f (x) =0 e f(4/5)

Answer 1

-x²+5x+6
quando x=0
0+0+6
f(0) = 6

f(4/5)

-(4/5)²+5(4/5)+6
-(16/25)+(20/5)+6

mmc 25,5,1 = 25

(-16+80+150)/25
234/25