Question

construa o grafico da função f(x)=x²+2x+5

Answer 1

Resposta:

-x2+ fx - 2 x - 5 = 0

( - 1 ) ⋅x2+ ( f- 2 ) ⋅ x + ( - 5 ) = 0

x =- ( f- 2 ) ±( f- 2 )2- 4 ⋅ ( - 1 ) ⋅ ( - 5 )----------------------√2 ⋅ ( - 1 )

x =- f+ 2 ±f2- 4 f+ 4 - ( 20 )---------------√- 2

x =f- 2 ±f2- 4 f- 16----------√2

x1=f- 2 +f2- 4 f- 16----------√2

x2=f- 2 -f2- 4 f- 16----------√2

espero ter ajudado :)