If f(x) = 3x2 – 2x + 4 and g(x) = 5x2 + 6x – 8, find (f - g)(x).

(3x^3-2x^2+4x)-(5x^3+6x^2-8x)= -2x^3-8x^2+4x

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204