Question

Dada a função quadrática f(x) -4x2 +5x -1, determine: a) F(-1) b) F(-5) c) F(0) d) F(1/2)​

Answer 1

Resposta:

Explicação passo a passo:

f(-1)=

-4.(-1)²+5.(-1)-1=

-4-5-1=

-9-1=

-10

f(-5)=

-4.(-5)²+5.(-5)-1=

-4.25-25-1=

-100-25-1=

-125-1=

-126

f(0)=

-4.0²+5.0-1=

0+0-1=

0-1=

-1

f(1/2)=

-4.(1/2)²+5.(1/2)-1=

-4.1/4+5/2-1=

-4/4+5/2-1=

-4/4+10/4-4/4=

+6/4-4/4=

+2/4= [simplifica por 2]

-1/2