Question

F(x) = 5x² -8x + 10

Answer 1

$D=b^2-4ac=64-4*50$ <0

$\forall x\in\R$ F(x)>0

F'(x)=10x-8

F'(x)=0;x=0.8

min(F(x))=F(0.8)=$\frac{34}{5}$