express f in standard form

Question

f(x)=-x^2+10x

Answer 1

Standard form of a quadratic equation is:

ax² + bx + c = 0

In this case:

a = -1

b = 10

c = 0

So, plugging it in:

-x² + 10x + 0 = 0

or

-x² + 10x = 0

It seems that it is already in standard form.