Question

What is the derivative of x^2 - x + 3 at the point x = 5?

Answer 1

${x}^{2} - x + 3$

derivative

$2x - 1 + 0$

then put the value x=5

$2 \times 5 - 1 \\ 10 - 1 \\9$

hence, the derivative of x²-x+3 at x=5 is 9.