F (x)=×квадрат +5x-1 f (x)=-1

Question

F (x)=×квадрат +5x-1
f (x)=-1

Answer 1

F (x)= F '(x) =2x +5;
f(x)=- 1;
2x + 5 = -1;
 2x = -1 - 5;
 2x = -6;
 2x = -3.