Question

1) Calcule os zeros da função f(x) = -5x² + 7x + 6. ​

Answer 1

Aplique bhaskara

b²-4ac=49-4.(-5).6=169=Δ

x1=(-b+√Δ)/2a=(-7+13)/2.(-5)=-6/10

x2=(-b-√Δ)/2a=(-7-13)/2.(-5)=2